{"id":13154,"date":"2026-05-28T01:48:01","date_gmt":"2026-05-28T01:48:01","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13154"},"modified":"2026-05-28T01:54:58","modified_gmt":"2026-05-28T01:54:58","slug":"sand-blasted-surface","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/sand-blasted-surface\/","title":{"rendered":"Sand Blasted Surface: The Complete Guide to Process, Ra Values, Standards &amp; Applications"},"content":{"rendered":"<div class=\"hlh-sbs\"><style>\r\n  \/* === Scoped styles for Sand Blasted Surface pillar page === *\/\r\n  .hlh-sbs { \r\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif;\r\n    color: #1f2a37;\r\n    line-height: 1.72;\r\n    font-size: 16.5px;\r\n    max-width: 1080px;\r\n    margin: 0 auto;\r\n    padding: 0 4px;\r\n    box-sizing: border-box;\r\n  }\r\n  .hlh-sbs *, .hlh-sbs *::before, .hlh-sbs *::after { box-sizing: border-box; }\r\n  .hlh-sbs h1, .hlh-sbs h2, .hlh-sbs h3, .hlh-sbs h4 {\r\n    color: #0f3057;\r\n    font-weight: 700;\r\n    line-height: 1.3;\r\n    margin: 0 0 0.6em;\r\n    letter-spacing: -0.01em;\r\n  }\r\n  .hlh-sbs h1 { font-size: 2.35rem; 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letter-spacing: 0.02em; border: none !important;\r\n    box-shadow: 0 8px 24px rgba(232,120,46,0.35); position: relative;\r\n    transition: all 0.2s ease;\r\n  }\r\n  .hlh-sbs-cta-button:hover { background: #c75d12; color: #fff !important; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(232,120,46,0.45); }\r\n\r\n  \/* SPEC CARD GRID *\/\r\n  .hlh-sbs-spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 22px 0; }\r\n  .hlh-sbs-spec-card {\r\n    background: #f6f7f9; border-radius: 8px; padding: 18px 20px;\r\n    border-left: 3px solid #0f3057;\r\n  }\r\n  .hlh-sbs-spec-card h4 { margin: 0 0 6px; color: #0f3057; font-size: 1rem; }\r\n  .hlh-sbs-spec-card p { font-size: 0.9rem; color: #4b5663; margin-bottom: 0; }\r\n\r\n  \/* RESPONSIVE *\/\r\n  @media (max-width: 780px) {\r\n    .hlh-sbs { font-size: 16px; }\r\n    .hlh-sbs h1, .hlh-sbs-hero h1 { font-size: 1.85rem; }\r\n    .hlh-sbs h2 { font-size: 1.4rem; }\r\n    .hlh-sbs-hero { padding: 32px 22px; }\r\n    .hlh-sbs-hero-stats { grid-template-columns: 1fr; }\r\n    .hlh-sbs-toc ol { columns: 1; }\r\n    .hlh-sbs-process { grid-template-columns: repeat(2, 1fr); }\r\n    .hlh-sbs-compare { grid-template-columns: 1fr; }\r\n    .hlh-sbs-cluster-grid { grid-template-columns: 1fr; }\r\n    .hlh-sbs-spec-grid { grid-template-columns: 1fr; }\r\n    .hlh-sbs-cta { padding: 32px 22px; }\r\n  }\r\n<\/style> <!-- HERO -->\r\n<section class=\"hlh-sbs-hero\">\r\n<div class=\"hlh-sbs-meta-row\"><span class=\"hlh-sbs-tag\">Surface Finishing \u00b7 Pillar Guide<\/span> <span class=\"hlh-sbs-date\">Last updated \u00b7 May 2026<\/span><\/div>\r\n<h1>Sand Blasted Surface: The Complete Guide to Process, Ra Values, Standards &amp; Applications<\/h1>\r\n<p class=\"hlh-sbs-lede\">From specification sheets to inspection acceptance \u2014 everything a sourcing manager, design engineer, or coating contractor needs to understand, specify, and verify a sand blasted surface in 2026. Written by the technical team at Jiangsu Henglihong Technology Co., Ltd., a manufacturer of abrasive blasting media supplying global industrial markets.<\/p>\r\n<div class=\"hlh-sbs-hero-stats\">\r\n<div class=\"hlh-sbs-stat\">\r\n<div class=\"hlh-sbs-stat-num\">Ra 0.3 \u2013 12.5 \u00b5m<\/div>\r\n<div class=\"hlh-sbs-stat-label\">Achievable roughness range<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-stat\">\r\n<div class=\"hlh-sbs-stat-num\">4 Global Standards<\/div>\r\n<div class=\"hlh-sbs-stat-label\">SSPC \u00b7 NACE \u00b7 ISO 8501 \u00b7 Swedish SA<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-stat\">\r\n<div class=\"hlh-sbs-stat-num\">21 In-Depth Guides<\/div>\r\n<div class=\"hlh-sbs-stat-label\">Linked throughout this resource<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<!-- KEY TAKEAWAYS -->\r\n<aside class=\"hlh-sbs-summary\">\r\n<h2>Key Takeaways<\/h2>\r\n<ul>\r\n<li>A <strong>sand blasted surface<\/strong> is a controlled, micro-textured profile produced by propelling abrasive media at a substrate under compressed air or wheel-driven energy.<\/li>\r\n<li>Resulting surface roughness typically falls between <strong>Ra 0.3 \u00b5m and Ra 12.5 \u00b5m<\/strong>, depending on media type, grit size, working pressure, nozzle distance, and dwell time.<\/li>\r\n<li>Four standards systems govern blast cleanliness and profile: <strong>SSPC (USA), NACE (USA), ISO 8501 (international), and the Swedish SA grades<\/strong> \u2014 they are cross-referenced but not identical.<\/li>\r\n<li>Correct media selection \u2014 garnet, aluminum oxide, glass bead, steel grit, or steel shot \u2014 determines roughness, embedment risk, recyclability, and downstream coating adhesion.<\/li>\r\n<li>Specification, inspection, and supplier verification follow a repeatable workflow that protects buyers from defects such as flash rust, embedded contaminants, and shadowing.<\/li>\r\n<\/ul>\r\n<\/aside>\r\n<!-- TOC --><nav class=\"hlh-sbs-toc\" aria-label=\"Table des mati\u00e8res\">\r\n<h2>Table of Contents<\/h2>\r\n<ol>\r\n<li><a href=\"#what-is\">What Is a Sand Blasted Surface?<\/a><\/li>\r\n<li><a href=\"#process\">How the Sand Blasting Process Works<\/a><\/li>\r\n<li><a href=\"#topography\">Surface Topography: Ra, Rz &amp; Profile<\/a><\/li>\r\n<li><a href=\"#standards\">Blast Cleanliness &amp; Profile Standards<\/a><\/li>\r\n<li><a href=\"#media\">Abrasive Media Selection Guide<\/a><\/li>\r\n<li><a href=\"#applications\">Applications by Material &amp; Industry<\/a><\/li>\r\n<li><a href=\"#cost\">Cost Considerations &amp; ROI<\/a><\/li>\r\n<li><a href=\"#defects\">Defects, Inspection &amp; QC<\/a><\/li>\r\n<li><a href=\"#safety\">Safety &amp; Environmental Compliance<\/a><\/li>\r\n<li><a href=\"#procurement\">Procurement Best Practices<\/a><\/li>\r\n<li><a href=\"#reference-library\">Further Reading &amp; Reference Library<\/a><\/li>\r\n<li><a href=\"#faq\">Questions fr\u00e9quemment pos\u00e9es<\/a><\/li>\r\n<\/ol>\r\n<\/nav><!-- SECTION 1: WHAT IS -->\r\n<section id=\"what-is\" class=\"hlh-sbs-section\">\r\n<h2>1. What Is a Sand Blasted Surface?<\/h2>\r\n<p>A <strong>sand blasted surface<\/strong> is a substrate whose surface layer has been mechanically modified by the high-velocity impact of abrasive particles, producing a controlled, uniformly textured profile. Despite the legacy name, modern industrial practice rarely uses actual silica sand \u2014 the term is preserved as an umbrella descriptor for <strong>abrasive blasting<\/strong> processes that include garnet blasting, aluminum oxide blasting, glass bead blasting, steel grit blasting, and shot blasting.<\/p>\r\n<p>The defining characteristic is a <strong>random but statistically uniform micro-topography<\/strong>. Each abrasive particle delivers localized kinetic energy that displaces material, removes contaminants, and leaves behind a peak-and-valley profile. When the process is properly controlled, the resulting surface exhibits:<\/p>\r\n<ul>\r\n<li>A clean, matte appearance free of mill scale, rust, paint, oxidation, and oils<\/li>\r\n<li>A measurable surface roughness suitable for the intended downstream process<\/li>\r\n<li>An &#8220;anchor pattern&#8221; that mechanically interlocks with subsequent coatings or adhesives<\/li>\r\n<li>No directional grain \u2014 unlike brushed, ground, or polished finishes<\/li>\r\n<\/ul>\r\n<div class=\"hlh-sbs-callout\">\r\n<div class=\"hlh-sbs-callout-title\">Why It Matters<\/div>\r\n<p>Modern protective coatings \u2014 epoxies, polyurethanes, powder coats, thermal spray, plasma electrolytic oxidation \u2014 almost universally specify a sand blasted surface as the substrate condition. The bond strength between coating and metal can vary by an order of magnitude depending on whether the underlying profile is correctly prepared.<\/p>\r\n<\/div>\r\n<h3>Visual identity of the finish<\/h3>\r\n<p>The surface presents as a uniform matte gray (or near-white for properly cleaned carbon steel) with a frosted, slightly velvety texture. There is no glare, no reflection, and no directionality. For a side-by-side photographic reference of how various grit sizes and media types appear at the macro and micro scale, see our visual reference guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-does-a-sand-blasted-surface-look-like-visual-guide-with-ra-examples\/\" target=\"_blank\" rel=\"noopener\">what a sand blasted surface looks like with Ra examples<\/a>.<\/p>\r\n<h3>A note on terminology<\/h3>\r\n<p>&#8220;Sand blasting,&#8221; &#8220;abrasive blasting,&#8221; &#8220;grit blasting,&#8221; and &#8220;shot blasting&#8221; are often used interchangeably in casual conversation, but engineering specifications distinguish them. Sand blasting and grit blasting refer to angular media driven by compressed air. Shot blasting refers to spherical media \u2014 typically steel shot \u2014 propelled by a centrifugal wheel rather than a nozzle. The differences in impact mechanics, recyclability, and resulting surface texture are explored in detail in our comparison of <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-vs-shot-blasting-vs-bead-blasting-surface-differences-explained\/\" target=\"_blank\" rel=\"noopener\">sandblasting vs shot blasting vs bead blasting<\/a>.<\/p>\r\n<p>For context on how this surface finish differs from machined alternatives like brushed, ground, or polished surfaces, the comparative guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-finish-vs-brushed-finish-vs-polished-side-by-side-comparison\/\" target=\"_blank\" rel=\"noopener\">sand blasted finish vs brushed vs polished<\/a> lays out the visual, functional, and cost trade-offs.<\/p>\r\n<\/section>\r\n<!-- SECTION 2: PROCESS -->\r\n<section id=\"process\" class=\"hlh-sbs-section\">\r\n<h2>2. How the Sand Blasting Process Works<\/h2>\r\n<p>Sandblasting is conceptually simple but governed by a handful of variables that, in combination, determine the final surface quality. The process can be broken into four stages:<\/p>\r\n<div class=\"hlh-sbs-process\">\r\n<div class=\"hlh-sbs-step\">\r\n<div class=\"hlh-sbs-step-num\">1<\/div>\r\n<div class=\"hlh-sbs-step-title\">Pre-Cleaning<\/div>\r\n<div class=\"hlh-sbs-step-desc\">Removal of oil, grease, and loose contaminants by solvent or alkaline wash. Required to prevent contaminant smearing during blasting.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-step\">\r\n<div class=\"hlh-sbs-step-num\">2<\/div>\r\n<div class=\"hlh-sbs-step-title\">Media Acceleration<\/div>\r\n<div class=\"hlh-sbs-step-desc\">Abrasive media is metered from a pressure pot or gravity hopper and accelerated through a nozzle (or centrifugal wheel for shot blasting).<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-step\">\r\n<div class=\"hlh-sbs-step-num\">3<\/div>\r\n<div class=\"hlh-sbs-step-title\">Surface Impact<\/div>\r\n<div class=\"hlh-sbs-step-desc\">Particles strike the substrate at 60\u2013200 m\/s, displacing contaminants and base material to generate the textured anchor pattern.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-step\">\r\n<div class=\"hlh-sbs-step-num\">4<\/div>\r\n<div class=\"hlh-sbs-step-title\">Post-Blast QC<\/div>\r\n<div class=\"hlh-sbs-step-desc\">Compressed air or vacuum removal of spent media and dust, followed by cleanliness and profile inspection before coating.<\/div>\r\n<\/div>\r\n<\/div>\r\n<h3>The four critical process parameters<\/h3>\r\n<p>Even with identical media, two operators can produce dramatically different surfaces. Four variables dominate the outcome:<\/p>\r\n<div class=\"hlh-sbs-table-wrap\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>Param\u00e8tres<\/th>\r\n<th>Typical Range<\/th>\r\n<th>Effect on Surface<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td><strong>Blast pressure<\/strong><\/td>\r\n<td>60 \u2013 110 psi (4 \u2013 7.5 bar)<\/td>\r\n<td>Higher pressure deepens the profile but accelerates media breakdown and can over-blast soft alloys.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Nozzle distance<\/strong><\/td>\r\n<td>150 \u2013 450 mm<\/td>\r\n<td>Closer nozzles increase impact energy and cutting rate; greater distance spreads the pattern and reduces roughness.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Impact angle<\/strong><\/td>\r\n<td>60\u00b0 \u2013 90\u00b0 (typical 75\u00b0)<\/td>\r\n<td>Near-perpendicular angles maximize crater depth; lower angles improve material removal and reduce embedment.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Dwell time<\/strong><\/td>\r\n<td>Variable<\/td>\r\n<td>Excessive dwell creates work-hardening, warping, and over-roughened &#8220;polished crater&#8221; valleys.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>Each of these parameters interacts with media type and substrate hardness in non-linear ways. The complete parametric model and operator-side adjustments are detailed in our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-sandblasting-works-pressure-nozzle-distance-angle-parameters\/\" target=\"_blank\" rel=\"noopener\">how sandblasting works: pressure, nozzle distance and angle parameters<\/a>.<\/p>\r\n<h3>A brief historical note<\/h3>\r\n<p>The process was patented in 1870 by American inventor Benjamin Chew Tilghman. What began as a simple compressed-air nozzle pushing silica sand against a metal plate has evolved into robotic blast cells, recycled steel grit systems, vapor-abrasive hybrids, and ultra-fine micro-blasting for medical implants. The full timeline is covered in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/the-history-evolution-of-abrasive-blasting-tilghman-to-modern-robots\/\" target=\"_blank\" rel=\"noopener\">the history and evolution of abrasive blasting<\/a>.<\/p>\r\n<\/section>\r\n<!-- SECTION 3: TOPOGRAPHY -->\r\n<section id=\"topography\" class=\"hlh-sbs-section\">\r\n<h2>3. Surface Topography: Ra, Rz &amp; Profile<\/h2>\r\n<p>To specify or accept a sand blasted surface, you must speak the language of <strong>surface metrology<\/strong>. Three measurements dominate technical drawings and coating specifications:<\/p>\r\n<div class=\"hlh-sbs-spec-grid\">\r\n<div class=\"hlh-sbs-spec-card\">\r\n<h4>Ra (Arithmetic Mean Roughness)<\/h4>\r\n<p>Average deviation of the surface profile from the mean line, expressed in micrometers (\u00b5m). The most commonly cited single value for sand blasted finishes.<\/p>\r\n<\/div>\r\n<div class=\"hlh-sbs-spec-card\">\r\n<h4>Rz (Mean Peak-to-Valley Height)<\/h4>\r\n<p>Average of the largest peak-to-valley distances across the sampling length. Better captures the &#8220;anchor pattern&#8221; depth coatings actually grip.<\/p>\r\n<\/div>\r\n<div class=\"hlh-sbs-spec-card\">\r\n<h4>Rmax \/ Ry (Maximum Profile Height)<\/h4>\r\n<p>The single greatest peak-to-valley height in the assessment length \u2014 critical for thin-film coatings where extreme peaks may protrude through the topcoat.<\/p>\r\n<\/div>\r\n<div class=\"hlh-sbs-spec-card\">\r\n<h4>Sa (3D Areal Roughness)<\/h4>\r\n<p>The areal equivalent of Ra, measured by interferometry or confocal microscopy over a 2D area rather than a line. Increasingly required in medical and aerospace specs.<\/p>\r\n<\/div>\r\n<\/div>\r\n<h3>Typical Ra values produced by common media<\/h3>\r\n<p>The following ranges reflect controlled production conditions at approximately 90 psi blast pressure, 300 mm nozzle distance, and 75\u00b0 impact angle on mild steel:<\/p>\r\n<div class=\"hlh-sbs-table-wrap\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>Type de m\u00e9dia<\/th>\r\n<th>Grit Size<\/th>\r\n<th>Approx. Ra (\u00b5m)<\/th>\r\n<th>Typical Use<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Glass bead<\/td>\r\n<td>#150 \u2013 #200<\/td>\r\n<td><strong>0.5 \u2013 0.8<\/strong><\/td>\r\n<td>Cosmetic matte, peening, food-grade equipment<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Oxyde d'aluminium<\/td>\r\n<td>#120<\/td>\r\n<td><strong>1.3<\/strong><\/td>\r\n<td>Coating prep on aluminum and stainless<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Oxyde d'aluminium<\/td>\r\n<td>#80<\/td>\r\n<td><strong>1.8<\/strong><\/td>\r\n<td>General industrial fabrication<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Grenat<\/td>\r\n<td>30\/60 mesh<\/td>\r\n<td><strong>2.5 \u2013 3.5<\/strong><\/td>\r\n<td>Marine, offshore, structural steel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Grains d'acier<\/td>\r\n<td>G-40<\/td>\r\n<td><strong>3.6 \u2013 5.0<\/strong><\/td>\r\n<td>Heavy fabrication, shipyards<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Grenaille d'acier<\/td>\r\n<td>S-330<\/td>\r\n<td><strong>2.0 \u2013 3.0<\/strong><\/td>\r\n<td>Cleaning castings, shot peening<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Coal slag<\/td>\r\n<td>20\/40 mesh<\/td>\r\n<td><strong>4.0 \u2013 7.0<\/strong><\/td>\r\n<td>Field blasting, single-use applications<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>These are starting points, not specifications. Actual Ra varies with substrate hardness, media wear state, and operator technique. Our complete <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-roughness-chart-ra-rz-values-by-media-and-grit\/\" target=\"_blank\" rel=\"noopener\">sand blasted surface roughness chart with Ra and Rz values by media and grit<\/a> includes dataset-style tables that can be cited in technical drawings.<\/p>\r\n<h3>How profile is measured<\/h3>\r\n<p>Three instruments dominate field and laboratory measurement: <strong>replica tape<\/strong> (Press-O-Film or Testex), <strong>surface comparators<\/strong> (visual standards), and <strong>stylus or optical profilometers<\/strong>. Each has tolerances and limitations that affect the acceptance decision. For the full inspection workflow and which method to choose for which job, see our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-measure-sand-blasted-surface-profile-replica-tape-comparator-stylus\/\" target=\"_blank\" rel=\"noopener\">how to measure sand blasted surface profile<\/a>.<\/p>\r\n<\/section>\r\n<!-- SECTION 4: STANDARDS -->\r\n<section id=\"standards\" class=\"hlh-sbs-section\">\r\n<h2>4. Blast Cleanliness &amp; Profile Standards<\/h2>\r\n<p>Specifications use shorthand codes that frequently confuse buyers because they look interchangeable but are not. Three observations matter before reading any standard:<\/p>\r\n<ol>\r\n<li><strong>Cleanliness \u2260 profile.<\/strong> SSPC SP grades, ISO Sa grades, and NACE numbers describe how much rust, mill scale, and contamination remain visible. They do not specify Ra or Rz.<\/li>\r\n<li><strong>Profile is specified separately<\/strong> using surface roughness numbers (Ra, Rz) or anchor pattern depth in mils\/microns, typically per ISO 8503.<\/li>\r\n<li><strong>Visual standards are interpretive.<\/strong> A photograph in ISO 8501-1 is the legal reference, not the written description \u2014 always inspect against the actual standard plate.<\/li>\r\n<\/ol>\r\n<h3>The four-standard cross-reference<\/h3>\r\n<div class=\"hlh-sbs-table-wrap\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>SSPC (USA)<\/th>\r\n<th>NACE<\/th>\r\n<th>ISO 8501-1 \/ Swedish SA<\/th>\r\n<th>Description<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td><strong>SP 5<\/strong><\/td>\r\n<td>NACE 1<\/td>\r\n<td>Sa 3<\/td>\r\n<td><strong>White metal blast<\/strong> \u2014 100% removal of all visible contaminants. Required for tank linings, immersion service, and aerospace.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>SP 10<\/strong><\/td>\r\n<td>NACE 2<\/td>\r\n<td>Sa 2\u00bd<\/td>\r\n<td><strong>Near-white blast<\/strong> \u2014 at least 95% of each unit area free of contaminants. The de facto industrial standard for high-performance coatings.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>SP 6<\/strong><\/td>\r\n<td>NACE 3<\/td>\r\n<td>Sa 2<\/td>\r\n<td><strong>Commercial blast<\/strong> \u2014 at least 66% of each unit area free of contaminants. Common for general structural steel.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>SP 7<\/strong><\/td>\r\n<td>NACE 4<\/td>\r\n<td>Sa 1<\/td>\r\n<td><strong>Brush-off blast<\/strong> \u2014 loose contaminants removed; tightly adhered mill scale may remain. Used under thick maintenance coatings.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>The full mapping \u2014 including SP 11 (power tool to bare metal), SP 14 (industrial blast), and ST grades \u2014 plus side-by-side photographic references, is consolidated in our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\/\" target=\"_blank\" rel=\"noopener\">SSPC SP5 \/ SP6 \/ SP10 vs ISO Sa 1 \/ Sa 2 \/ Sa 2.5 \/ Sa 3 complete cross-reference<\/a>.<\/p>\r\n<h3>The NACE family in detail<\/h3>\r\n<p>NACE International (now AMPP) developed its own number-based system that maps to SSPC but is sometimes specified independently in pipeline, offshore, and petrochemical work. NACE 1 through NACE 4 are functionally equivalent to SP 5, SP 10, SP 6, and SP 7 respectively. The nuances \u2014 including wet abrasive blasting variants and joint NACE\/SSPC documents \u2014 are unpacked in our deep-dive on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/nace-1-2-3-4-blast-cleaning-standards-explained-with-visual-references\/\" target=\"_blank\" rel=\"noopener\">NACE 1\/2\/3\/4 blast cleaning standards explained with visual references<\/a>.<\/p>\r\n<h3>Matching profile depth to coating DFT<\/h3>\r\n<p>An undersized profile starves the coating of mechanical anchor points; an oversized profile causes peaks to project through the topcoat, leading to early corrosion sites. As a rule of thumb, the dry film thickness (DFT) of the coating should be <strong>at least three times the anchor pattern depth<\/strong>. For thin shop primers around 20\u201325 \u00b5m DFT, an aggressive 100 \u00b5m profile will cause coating consumption to balloon and adhesion to fail. The pairing logic is mapped out in our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/anchor-pattern-specifications-how-to-match-profile-depth-to-coating-dft\/\" target=\"_blank\" rel=\"noopener\">anchor pattern specifications guide for matching profile depth to coating DFT<\/a>.<\/p>\r\n<\/section>\r\n<!-- SECTION 5: MEDIA -->\r\n<section id=\"media\" class=\"hlh-sbs-section\">\r\n<h2>5. Abrasive Media Selection Guide<\/h2>\r\n<p>The single largest determinant of a sand blasted surface \u2014 beyond the parameters discussed above \u2014 is the abrasive media itself. Each media class has a defining hardness, particle shape, density, and life cycle that drives both surface outcome and total cost per square meter.<\/p>\r\n<div class=\"hlh-sbs-compare\">\r\n<div class=\"hlh-sbs-compare-card\">\r\n<h4>Grenat<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 7.5 \u2013 8.0 \u00b7 Angular natural<\/p>\r\n<ul>\r\n<li>Low embedment risk<\/li>\r\n<li>Faible production de poussi\u00e8re<\/li>\r\n<li>Recyclable 3\u20135 cycles<\/li>\r\n<li>Preferred for stainless and marine work<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"hlh-sbs-compare-card accent\">\r\n<h4>Oxyde d'aluminium<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 9.0 \u00b7 Angular synthetic<\/p>\r\n<ul>\r\n<li>Aggressive cutting action<\/li>\r\n<li>Long media life (15\u201320 cycles)<\/li>\r\n<li>Sharp, consistent profile<\/li>\r\n<li>Industry standard for aerospace prep<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"hlh-sbs-compare-card\">\r\n<h4>Glass Bead<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 5.5 \u2013 6.0 \u00b7 Spherical<\/p>\r\n<ul>\r\n<li>Cosmetic satin finish<\/li>\r\n<li>No directional pattern<\/li>\r\n<li>Mild peening effect<\/li>\r\n<li>Used on aluminum, stainless, brass<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"hlh-sbs-compare-card\">\r\n<h4>Grain d'acier<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 7.0 \u00b7 Angular metallic<\/p>\r\n<ul>\r\n<li>Highest cutting efficiency<\/li>\r\n<li>Recyclable 100+ cycles<\/li>\r\n<li>Aggressive deep profile<\/li>\r\n<li>Shipyards, structural steel<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"hlh-sbs-compare-card accent\">\r\n<h4>Grenaille d'acier<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 7.0 \u00b7 Spherical metallic<\/p>\r\n<ul>\r\n<li>Peening \/ cleaning hybrid<\/li>\r\n<li>Long media life<\/li>\r\n<li>Lower roughness than grit<\/li>\r\n<li>Castings, foundry, automotive<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"hlh-sbs-compare-card\">\r\n<h4>Coal Slag \/ Copper Slag<\/h4>\r\n<p style=\"margin: 4px 0 8px; font-size: 0.85rem; color: #5b6573;\">Mohs 6.0 \u2013 7.0 \u00b7 Angular by-product<\/p>\r\n<ul>\r\n<li>Low cost per ton<\/li>\r\n<li>Single-use only<\/li>\r\n<li>High dust output<\/li>\r\n<li>Field blasting, bridges, tanks<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n<h3>Comment choisir<\/h3>\r\n<p>A practical media selection follows three filters: <strong>substrate compatibility<\/strong> (hardness, embedment sensitivity), <strong>downstream process requirement<\/strong> (coating, anodizing, bonding), and <strong>economics<\/strong> (recyclable closed-loop systems versus single-pass field work). For example, a stainless steel surgical instrument cannot tolerate iron contamination, ruling out steel media entirely. A 20,000 m\u00b2 ship hull cannot economically use 15-cycle aluminum oxide and instead specifies recyclable steel grit in an enclosed yard.<\/p>\r\n<div class=\"hlh-sbs-callout hlh-sbs-callout-tip\">\r\n<div class=\"hlh-sbs-callout-title\">Henglihong Media Production<\/div>\r\n<p>Jiangsu Henglihong Technology Co., Ltd. manufactures and exports a full line of abrasive blasting media \u2014 including aluminum oxide, garnet, glass bead, steel grit, and steel shot \u2014 with batch certification for grit consistency, conductivity, and silica content. Sample programs are available for technical evaluation before bulk order.<\/p>\r\n<\/div>\r\n<\/section>\r\n<!-- SECTION 6: APPLICATIONS -->\r\n<section id=\"applications\" class=\"hlh-sbs-section\">\r\n<h2>6. Applications by Material &amp; Industry<\/h2>\r\n<p>The sand blasted surface specification varies by material \u2014 not because the underlying physics changes, but because each substrate has its own constraints on hardness, contamination tolerance, and downstream chemistry. The following sections summarize the dominant patterns; each links to a dedicated material guide for specification-level detail.<\/p>\r\n<h3>Acier inoxydable<\/h3>\r\n<p>Stainless steel demands careful media selection to avoid iron contamination that destroys corrosion resistance. Glass bead and stainless-compatible aluminum oxide are standard, often followed by passivation per ASTM A967. Architectural stainless and food-grade equipment specify a uniform matte finish with Ra typically 0.4\u20130.8 \u00b5m. Hygiene-critical surfaces follow EHEDG and 3-A Sanitary guidelines. The complete specification framework is covered in our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-stainless-steel-finish-grades-passivation-hygiene-standards\/\" target=\"_blank\" rel=\"noopener\">sand blasted stainless steel finish grades, passivation, and hygiene standards<\/a>.<\/p>\r\n<h3>Aluminium<\/h3>\r\n<p>Aluminum is softer than steel and easily over-blasted. Glass bead (#100\u2013#170) is the dominant choice for pre-anodizing preparation per MIL-A-8625. Bead-blast-then-anodize produces the characteristic uniform matte finish seen on consumer electronics enclosures, automotive trim, and aerospace structural panels. Aggressive media or excessive pressure causes warping in thin sections. Full process windows are detailed in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-aluminum-pre-anodizing-bead-blast-specifications-mil-a-8625\/\" target=\"_blank\" rel=\"noopener\">sand blasted aluminum: pre-anodizing bead blast specifications (MIL-A-8625)<\/a>.<\/p>\r\n<h3>Titanium for medical implants<\/h3>\r\n<p>Titanium implants \u2014 dental, orthopedic, cranial \u2014 rely on a sand blasted, large-grit, acid-etched (SLA) surface to promote osseointegration. The Sa roughness window is narrow: typically 1.5\u20132.5 \u00b5m to maximize osteoblast attachment without compromising fatigue strength. Alumina particles are the historical standard, although calcium phosphate alternatives are gaining ground for biocompatibility. Our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-titanium-for-medical-implants-sa-roughness-for-osseointegration\/\" target=\"_blank\" rel=\"noopener\">sand blasted titanium for medical implants: Sa roughness for osseointegration<\/a> covers the regulatory and research landscape.<\/p>\r\n<h3>Architectural and decorative glass<\/h3>\r\n<p>Glass responds to sandblasting with frosting, etching, and patterned decoration depending on mask design and dwell time. Aluminum oxide or specialized soda lime media replaces silica sand to prevent crystalline silica exposure. Shower enclosures, wayfinding signage, and decorative panels routinely specify sand blasted finishes. See <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-glass-etching-frosting-decorative-architectural-applications\/\" target=\"_blank\" rel=\"noopener\">sand blasted glass: etching, frosting and decorative architectural applications<\/a>.<\/p>\r\n<h3>Concrete substrates<\/h3>\r\n<p>Sand blasted concrete reveals aggregate, removes laitance, and opens the surface porosity for sealers, epoxy coatings, or decorative resin floors. Light blast removes only the cement paste; medium exposes fine aggregate; heavy reveals coarse aggregate for decorative effect. Application logic is covered in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-concrete-surface-preparation-for-coating-decorative-exposure\/\" target=\"_blank\" rel=\"noopener\">sand blasted concrete: surface preparation for coating and decorative exposure<\/a>.<\/p>\r\n<h3>Marine and offshore steel<\/h3>\r\n<p>Few applications are as demanding as marine and offshore. Sa 2\u00bd to Sa 3 cleanliness, a profile of 50\u2013100 \u00b5m Rz, and immediate priming within a four-hour window before flash rust forms are typical specifications. Recyclable steel grit dominates yard work; garnet handles touch-up. The detailed workflow is laid out in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-steel-for-marine-offshore-sa-2-5-zinc-primer-workflow\/\" target=\"_blank\" rel=\"noopener\">sand blasted steel for marine and offshore: SA 2.5 + zinc primer workflow<\/a>.<\/p>\r\n<h3>Other industries at a glance<\/h3>\r\n<ul>\r\n<li><strong>A\u00e9rospatiale :<\/strong> SP 5 \/ SP 10 cleanliness with aluminum oxide for structural primer prep; glass bead peening for fatigue-critical fasteners.<\/li>\r\n<li><strong>Automotive:<\/strong> Steel shot for casting deburring and cleaning; bead blasting for cosmetic alloy wheels.<\/li>\r\n<li><strong>Oil &amp; gas pipelines:<\/strong> Garnet at SP 10 cleanliness, profile 60\u201390 \u00b5m, before fusion-bonded epoxy coating.<\/li>\r\n<li><strong>Construction equipment:<\/strong> Steel grit at SP 6, followed by epoxy primer and polyurethane topcoat.<\/li>\r\n<\/ul>\r\n<\/section>\r\n<!-- SECTION 7: COST -->\r\n<section id=\"cost\" class=\"hlh-sbs-section\">\r\n<h2>7. Cost Considerations &amp; ROI<\/h2>\r\n<p>Sand blasting cost is rarely a single line item; it is the sum of media, labor, equipment depreciation, containment, and waste disposal. Industry benchmarks for outsourced shop blasting in 2026 generally fall between <strong>USD 8 and USD 35 per square meter<\/strong>, depending on the region, target cleanliness, and media type.<\/p>\r\n<div class=\"hlh-sbs-table-wrap\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>Cost Driver<\/th>\r\n<th>Share of Total Cost<\/th>\r\n<th>Levers for Reduction<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Abrasive media consumption<\/td>\r\n<td>25 \u2013 45%<\/td>\r\n<td>Switch to recyclable media; closed-loop reclamation<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Labor<\/td>\r\n<td>30 \u2013 45%<\/td>\r\n<td>Automation; robotic blast cells; operator training<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Compressed air \/ energy<\/td>\r\n<td>10 \u2013 18%<\/td>\r\n<td>Right-sized compressors; nozzle wear monitoring<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Containment &amp; waste disposal<\/td>\r\n<td>8 \u2013 20%<\/td>\r\n<td>Specify low-silica media; dust collection optimization<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>For quoting accuracy, regional price benchmarks, and a procurement-side cost model that separates fixed from variable contributions, see our complete <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-cost-guide-per-square-meter-pricing-by-region-method\/\" target=\"_blank\" rel=\"noopener\">sand blasted surface cost guide: per square meter pricing by region and method<\/a>.<\/p>\r\n<h3>The hidden ROI: media choice over surface area<\/h3>\r\n<p>For high-throughput shops processing more than 5,000 m\u00b2 per month, the total cost of using single-use coal slag at low unit cost can exceed the cost of recyclable aluminum oxide by 30\u201360% over a 12-month period when waste disposal and rework are factored in. Procurement decisions should look at <strong>total cost per m\u00b2 of acceptable surface<\/strong>, not media price per ton.<\/p>\r\n<\/section>\r\n<!-- SECTION 8: DEFECTS -->\r\n<section id=\"defects\" class=\"hlh-sbs-section\">\r\n<h2>8. Defects, Inspection &amp; Quality Control<\/h2>\r\n<p>A finished sand blasted surface that passes visual inspection can still fail downstream. The five most common defects \u2014 and their root causes \u2014 should be familiar to every buyer and QC inspector:<\/p>\r\n<div class=\"hlh-sbs-table-wrap\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>Defect<\/th>\r\n<th>Visual Symptom<\/th>\r\n<th>Root Cause<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td><strong>Shadowing<\/strong><\/td>\r\n<td>Dark patches where coatings or scale remain bonded<\/td>\r\n<td>Insufficient cleanliness grade; weak operator overlap<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Embedment<\/strong><\/td>\r\n<td>Black or metallic particles lodged in profile valleys<\/td>\r\n<td>Wrong media for substrate; broken or worn media<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Flash rust<\/strong><\/td>\r\n<td>Light orange\/brown bloom appearing within minutes<\/td>\r\n<td>Humid environment; delayed priming after blast<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Over-blasting<\/strong><\/td>\r\n<td>Polished crater valleys; loss of profile sharpness<\/td>\r\n<td>Excessive dwell, pressure too high, exhausted media<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Profile too low<\/strong><\/td>\r\n<td>Smooth appearance; coating adhesion failure on test<\/td>\r\n<td>Worn media; pressure too low; wrong grit size<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>Each defect has a remediation path \u2014 sometimes re-blasting, sometimes accepting with documented deviation. The full taxonomy and field-ready troubleshooting decision tree is in our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/common-sand-blasted-surface-defects-shadowing-embedment-flash-rust\/\" target=\"_blank\" rel=\"noopener\">common sand blasted surface defects: shadowing, embedment, and flash rust<\/a>.<\/p>\r\n<h3>Inspection workflow<\/h3>\r\n<p>A defensible acceptance follows three steps: visual comparison against ISO 8501-1 plates (or SSPC visual references), profile measurement using replica tape or stylus instrument, and cleanliness verification (chloride salt test per ISO 8502-6, dust contamination per ISO 8502-3). The complete documentation chain \u2014 including what to record on the QC sheet \u2014 is covered in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-inspection-acceptance-visual-profile-cleanliness\/\" target=\"_blank\" rel=\"noopener\">sand blasted surface inspection and acceptance: visual, profile, cleanliness<\/a>.<\/p>\r\n<\/section>\r\n<!-- SECTION 9: SAFETY -->\r\n<section id=\"safety\" class=\"hlh-sbs-section\">\r\n<h2>9. Safety &amp; Environmental Compliance<\/h2>\r\n<p>Modern sandblasting is regulated. The defining inflection point was the U.S. OSHA Respirable Crystalline Silica standard (29 CFR 1910.1053 and 1926.1153), which limits operator exposure to 50 \u00b5g\/m\u00b3 as an 8-hour time-weighted average. Effectively, this has eliminated true silica sand from most regulated workplaces in North America and Europe.<\/p>\r\n<p>Compliant alternatives include garnet, aluminum oxide, steel grit, glass bead, and engineered slag products \u2014 all of which Henglihong supplies with batch documentation. The regulatory background, jurisdictional differences, and the eco-friendly media landscape are covered in <a href=\"https:\/\/hlh-js.com\/resource\/blog\/osha-silica-rule-eco-friendly-alternatives-to-silica-sand-for-blasting\/\" target=\"_blank\" rel=\"noopener\">OSHA silica rule and eco-friendly alternatives to silica sand for blasting<\/a>.<\/p>\r\n<h3>Operator protection essentials<\/h3>\r\n<ul>\r\n<li><strong>Supplied-air respirators<\/strong> (Type CE per NIOSH) rather than dust masks<\/li>\r\n<li><strong>Blast suits and gauntlets<\/strong> with abrasion-resistant outer layer<\/li>\r\n<li><strong>Hearing protection<\/strong> \u2014 blast nozzles routinely exceed 110 dBA<\/li>\r\n<li><strong>Containment<\/strong> \u2014 full-enclosure cabinets, blast rooms, or vacuum-recovery systems<\/li>\r\n<li><strong>Air quality monitoring<\/strong> \u2014 periodic personal sampling and dust collector validation<\/li>\r\n<\/ul>\r\n<h3>Environmental considerations<\/h3>\r\n<p>Spent abrasive is classified as industrial waste in most jurisdictions and may carry hazardous-waste designation if blasting a lead-based coating, chrome plating, or contaminated steel. Closed-loop recycling \u2014 feasible with steel grit, steel shot, and certain garnet grades \u2014 reduces both cost and disposal burden.<\/p>\r\n<\/section>\r\n<!-- SECTION 10: PROCUREMENT -->\r\n<section id=\"procurement\" class=\"hlh-sbs-section\">\r\n<h2>10. Procurement Best Practices<\/h2>\r\n<p>For sourcing managers and project engineers, a defensible procurement specification for a sand blasted surface contains seven mandatory elements:<\/p>\r\n<ol>\r\n<li><strong>Substrate identification<\/strong> \u2014 material grade, thickness, prior condition<\/li>\r\n<li><strong>Cleanliness standard<\/strong> \u2014 e.g., ISO 8501-1 Sa 2\u00bd or SSPC SP 10<\/li>\r\n<li><strong>Profile requirement<\/strong> \u2014 Ra or Rz range, with measurement method<\/li>\r\n<li><strong>Approved media types<\/strong> \u2014 and grit size range<\/li>\r\n<li><strong>Holding time \/ re-blast window<\/strong> \u2014 typically 4 hours to first coat in humid environments<\/li>\r\n<li><strong>Inspection method<\/strong> \u2014 visual reference, profile measurement, cleanliness test<\/li>\r\n<li><strong>Acceptance &amp; rejection criteria<\/strong> \u2014 including documented deviation procedure<\/li>\r\n<\/ol>\r\n<p>A specification template that consolidates these elements into a single one-page document \u2014 usable for RFQ, supplier qualification, and on-site inspection \u2014 is provided in our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">how to write a sand blasted surface spec for suppliers (free template)<\/a>.<\/p>\r\n<div class=\"hlh-sbs-callout\">\r\n<div class=\"hlh-sbs-callout-title\">Supplier Qualification Tip<\/div>\r\n<p>Before placing a bulk media order, request a 25 kg sample with batch certification covering particle size distribution, hardness, conductivity, chloride content, and silica fraction. A media supplier unable to provide a current MTR (mill test report) is not a serious candidate for industrial supply.<\/p>\r\n<\/div>\r\n<\/section>\r\n<!-- REFERENCE LIBRARY -->\r\n<section id=\"reference-library\" class=\"hlh-sbs-section\">\r\n<h2>11. Further Reading &amp; Reference Library<\/h2>\r\n<p>This pillar is the entry point to a 21-article reference set covering every aspect of sand blasted surface specification, execution, and inspection. Each companion guide is written for a specific operational question and links back to the relevant sections of this resource.<\/p>\r\n<div class=\"hlh-sbs-clusters\">\r\n<div class=\"hlh-sbs-cluster-group\">\r\n<h3>Process &amp; Fundamentals<\/h3>\r\n<div class=\"hlh-sbs-cluster-grid\">\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-does-a-sand-blasted-surface-look-like-visual-guide-with-ra-examples\/\" target=\"_blank\" rel=\"noopener\">What Does a Sand Blasted Surface Look Like? Visual Guide with Ra Examples<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Photographic reference of surface appearance across grit sizes and media.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-vs-shot-blasting-vs-bead-blasting-surface-differences-explained\/\" target=\"_blank\" rel=\"noopener\">Sandblasting vs Shot Blasting vs Bead Blasting: Surface Differences Explained<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Process mechanics, equipment, and resulting finishes compared.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-sandblasting-works-pressure-nozzle-distance-angle-parameters\/\" target=\"_blank\" rel=\"noopener\">How Sandblasting Works: Pressure, Nozzle Distance &amp; Angle Parameters<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">The four-variable model that governs outcome quality.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-finish-vs-brushed-finish-vs-polished-side-by-side-comparison\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Finish vs Brushed Finish vs Polished: Side-by-Side Comparison<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Visual, functional, and cost trade-offs across surface finishes.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/the-history-evolution-of-abrasive-blasting-tilghman-to-modern-robots\/\" target=\"_blank\" rel=\"noopener\">The History &amp; Evolution of Abrasive Blasting (Tilghman to Modern Robots)<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">From the 1870 patent to robotic blast cells in modern manufacturing.<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-group\">\r\n<h3>Standards &amp; Technical Parameters<\/h3>\r\n<div class=\"hlh-sbs-cluster-grid\">\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-roughness-chart-ra-rz-values-by-media-and-grit\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Surface Roughness Chart: Ra &amp; Rz Values by Media and Grit<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Dataset of measured values across the most common abrasive systems.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\/\" target=\"_blank\" rel=\"noopener\">SSPC SP5 \/ SP6 \/ SP10 vs ISO Sa 1 \/ Sa 2 \/ Sa 2.5 \/ Sa 3: Complete Cross-Reference<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Authoritative mapping of cleanliness standards across regions.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/nace-1-2-3-4-blast-cleaning-standards-explained-with-visual-references\/\" target=\"_blank\" rel=\"noopener\">NACE 1\/2\/3\/4 Blast Cleaning Standards Explained with Visual References<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">The NACE\/AMPP system explained for pipeline and offshore work.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-measure-sand-blasted-surface-profile-replica-tape-comparator-stylus\/\" target=\"_blank\" rel=\"noopener\">How to Measure Sand Blasted Surface Profile: Replica Tape, Comparator, Stylus<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Instruments, tolerances, and which to choose for which application.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/anchor-pattern-specifications-how-to-match-profile-depth-to-coating-dft\/\" target=\"_blank\" rel=\"noopener\">Anchor Pattern Specifications: How to Match Profile Depth to Coating DFT<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Pairing profile depth with coating dry film thickness for reliable adhesion.<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-group\">\r\n<h3>Materials &amp; Applications<\/h3>\r\n<div class=\"hlh-sbs-cluster-grid\">\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-stainless-steel-finish-grades-passivation-hygiene-standards\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Stainless Steel: Finish Grades, Passivation &amp; Hygiene Standards<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">ASTM A967, EHEDG, and 3-A guidelines for stainless applications.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-aluminum-pre-anodizing-bead-blast-specifications-mil-a-8625\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Aluminum: Pre-Anodizing Bead Blast Specifications (MIL-A-8625)<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Bead blast windows for uniform matte anodized finishes.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-titanium-for-medical-implants-sa-roughness-for-osseointegration\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Titanium for Medical Implants: Sa Roughness for Osseointegration<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">SLA surfaces, Sa targeting, and biocompatibility considerations.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-glass-etching-frosting-decorative-architectural-applications\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Glass: Etching, Frosting &amp; Decorative Architectural Applications<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Architectural and signage applications for sand blasted glass.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-concrete-surface-preparation-for-coating-decorative-exposure\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Concrete: Surface Preparation for Coating &amp; Decorative Exposure<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">From laitance removal to deep aggregate exposure for decorative effect.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-steel-for-marine-offshore-sa-2-5-zinc-primer-workflow\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Steel for Marine &amp; Offshore: SA 2.5 + Zinc Primer Workflow<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">The full yard workflow for marine corrosion-protected steel.<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-group\">\r\n<h3>Procurement, Cost &amp; Defects<\/h3>\r\n<div class=\"hlh-sbs-cluster-grid\">\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-cost-guide-per-square-meter-pricing-by-region-method\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Surface Cost Guide: Per Square Meter Pricing by Region &amp; Method<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Benchmarked pricing across regions and process types.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">How to Write a Sand Blasted Surface Spec for Suppliers (Free Template)<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Downloadable one-page RFQ-ready specification template.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/common-sand-blasted-surface-defects-shadowing-embedment-flash-rust\/\" target=\"_blank\" rel=\"noopener\">Common Sand Blasted Surface Defects: Shadowing, Embedment, Flash Rust<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Defect catalogue with root cause and remediation paths.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-inspection-acceptance-visual-profile-cleanliness\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Surface Inspection &amp; Acceptance: Visual + Profile + Cleanliness<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">A three-axis QC framework for defensible acceptance.<\/div>\r\n<\/div>\r\n<div class=\"hlh-sbs-cluster-card\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/osha-silica-rule-eco-friendly-alternatives-to-silica-sand-for-blasting\/\" target=\"_blank\" rel=\"noopener\">OSHA Silica Rule &amp; Eco-Friendly Alternatives to Silica Sand for Blasting<\/a>\r\n<div class=\"hlh-sbs-cluster-desc\">Regulatory background and compliant media alternatives.<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<!-- FAQ -->\r\n<section id=\"faq\" class=\"hlh-sbs-section hlh-sbs-faq\">\r\n<h2>12. Frequently Asked Questions<\/h2>\r\n<details>\r\n<summary>What is a sand blasted surface?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>A sand blasted surface is a substrate that has been mechanically modified by the high-velocity impact of abrasive media \u2014 typically garnet, aluminum oxide, glass bead, or steel grit \u2014 to remove contaminants and produce a controlled micro-roughened profile. The term &#8220;sand&#8221; is historical; actual silica sand is rarely used in regulated industrial settings today.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>What Ra roughness does sandblasting produce?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>Practical Ra ranges from approximately 0.5 \u00b5m with fine glass bead media to 7.0 \u00b5m or higher with coarse coal slag. The most common industrial range is 1.5\u20134.0 \u00b5m, achieved with aluminum oxide or garnet at #80\u201330 grit. The specific value depends on media, grit size, blast pressure, nozzle distance, and substrate hardness.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>What is the difference between SP 10 and Sa 2\u00bd?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>SSPC SP 10 (USA) and ISO 8501-1 Sa 2\u00bd (international) are functionally equivalent and both describe a &#8220;near-white metal blast&#8221; \u2014 a surface from which at least 95% of each unit area is free of all visible contaminants such as mill scale, rust, and paint. NACE 2 is the matching designation in the NACE\/AMPP system. Coating specifications often cite both designations to avoid ambiguity.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>Is sand blasted surface preparation required before painting?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>For high-performance protective coatings on metal \u2014 epoxy, polyurethane, zinc-rich primer, powder coat, thermal spray \u2014 yes, almost universally. Painting over mill scale or unprepared steel reduces coating life by 50% or more. For light decorative paints over previously coated surfaces, lighter preparation methods such as SP 7 brush-off blast or solvent cleaning may suffice.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>Which abrasive media is best for stainless steel?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>Glass bead and stainless-compatible aluminum oxide are the safest choices because they avoid iron contamination that compromises corrosion resistance. Steel grit and steel shot must never be used on stainless. Garnet is acceptable provided the supplier certifies a low iron content. Post-blast passivation per ASTM A967 restores the chromium oxide layer.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>How long can a sand blasted surface sit before coating?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>In humid environments (above 70% relative humidity), flash rust can begin forming within 30 minutes to 4 hours on bare carbon steel. Industry practice is to apply primer within the same shift, ideally within 4 hours. Climate-controlled blast halls and dehumidification can extend the window. Marine and offshore specifications often mandate a 4-hour maximum.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>What does a sand blasted surface cost per square meter in 2026?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>Shop blasting in 2026 typically costs USD 8\u201335 per square meter, depending on the region, cleanliness standard, media type, and project size. Field blasting is generally higher due to containment, scaffolding, and waste handling. Recyclable closed-loop systems lower the per-square-meter cost over time even though equipment investment is higher.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>Is silica sand still legal for sandblasting?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>Silica sand for abrasive blasting is heavily restricted in the United States (OSHA 29 CFR 1910.1053 \/ 1926.1153), the European Union, the United Kingdom, and most regulated industrial markets. Compliant alternatives include garnet, aluminum oxide, glass bead, steel grit, and engineered slag products. Specific regulations vary by jurisdiction and end-use.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>How do you measure a sand blasted surface profile in the field?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>The most widely accepted field method is replica tape (Press-O-Film or Testex) read with a spring micrometer, calibrated per ASTM D4417 Method C. Surface comparators (visual standards per ISO 8503-1) provide a rapid visual reference. Stylus or optical profilometers are used in shop and lab settings for higher precision.<\/p>\r\n<\/div>\r\n<\/details><details>\r\n<summary>Does Henglihong supply abrasive blasting media internationally?<\/summary>\r\n<div class=\"hlh-sbs-faq-body\">\r\n<p>Yes. Jiangsu Henglihong Technology Co., Ltd. manufactures and exports aluminum oxide, garnet, glass bead, steel grit, and steel shot to industrial buyers across more than 40 countries. Sample programs, batch certification, and OEM packaging are available on request. Detailed product datasheets and inquiry options are accessible from the main website.<\/p>\r\n<\/div>\r\n<\/details><\/section>\r\n<!-- CTA -->\r\n<section id=\"cta\" class=\"hlh-sbs-cta\">\r\n<h2>Request an Abrasive Blasting Media Sample<\/h2>\r\n<p>Specifying a sand blasted surface starts with the right media. Jiangsu Henglihong Technology Co., Ltd. provides certified samples of aluminum oxide, garnet, glass bead, steel grit, and steel shot for technical evaluation \u2014 with batch documentation covering particle size distribution, hardness, conductivity, and silica content.<\/p>\r\n<a class=\"hlh-sbs-cta-button\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Sample \u2192<\/a><\/section>\r\n<!-- JSON-LD: Article + FAQPage + BreadcrumbList --> <script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Sand Blasted Surface: The Complete Guide to Process, Ra Values, Standards & Applications\",\n            \"description\": \"Comprehensive 2026 guide to sand blasted surface specification, including Ra\\\/Rz roughness values, SSPC\\\/NACE\\\/ISO 8501 cleanliness standards, abrasive media selection, applications across stainless steel, aluminum, titanium, glass, concrete, and marine steel, plus cost benchmarks and defect troubleshooting.\",\n            \"datePublished\": \"2026-05-01\",\n            \"dateModified\": \"2026-05-01\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"mainEntityOfPage\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/sand-blasted-surface\\\/\",\n            \"about\": [\n                {\n                    \"@type\": \"Thing\",\n                    \"name\": \"Sand blasted surface\"\n                },\n                {\n                    \"@type\": \"Thing\",\n                    \"name\": \"Abrasive blasting\"\n                },\n                {\n                    \"@type\": \"Thing\",\n                    \"name\": \"Surface preparation\"\n                },\n                {\n                    \"@type\": \"Thing\",\n                    \"name\": \"Surface roughness\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is a sand blasted surface?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"A sand blasted surface is a substrate that has been mechanically modified by the high-velocity impact of abrasive media \\u2014 typically garnet, aluminum oxide, glass bead, or steel grit \\u2014 to remove contaminants and produce a controlled micro-roughened profile.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What Ra roughness does sandblasting produce?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Practical Ra ranges from approximately 0.5 \\u00b5m with fine glass bead media to 7.0 \\u00b5m or higher with coarse coal slag. The most common industrial range is 1.5\\u20134.0 \\u00b5m, achieved with aluminum oxide or garnet at #80\\u201330 grit.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the difference between SP 10 and Sa 2.5?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"SSPC SP 10 and ISO 8501-1 Sa 2.5 are functionally equivalent and both describe a near-white metal blast \\u2014 a surface from which at least 95% of each unit area is free of all visible contaminants. NACE 2 is the matching designation in the NACE\\\/AMPP system.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is sand blasted surface preparation required before painting?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"For high-performance protective coatings on metal \\u2014 epoxy, polyurethane, zinc-rich primer, powder coat, thermal spray \\u2014 yes, almost universally. Painting over mill scale or unprepared steel reduces coating life by 50% or more.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Which abrasive media is best for stainless steel?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Glass bead and stainless-compatible aluminum oxide are the safest choices because they avoid iron contamination. Steel grit and steel shot must never be used on stainless. Post-blast passivation per ASTM A967 restores the chromium oxide layer.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How long can a sand blasted surface sit before coating?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"In humid environments above 70% relative humidity, flash rust can begin forming within 30 minutes to 4 hours on bare carbon steel. Industry practice is to apply primer within the same shift, ideally within 4 hours.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What does a sand blasted surface cost per square meter in 2026?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Shop blasting in 2026 typically costs USD 8\\u201335 per square meter, depending on region, cleanliness standard, media type, and project size. Field blasting is generally higher due to containment and waste handling.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is silica sand still legal for sandblasting?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Silica sand for abrasive blasting is heavily restricted in the United States (OSHA 29 CFR 1910.1053 \\\/ 1926.1153), the European Union, the United Kingdom, and most regulated industrial markets. Compliant alternatives include garnet, aluminum oxide, glass bead, steel grit, and engineered slag products.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How do you measure a sand blasted surface profile in the field?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"The most widely accepted field method is replica tape (Press-O-Film or Testex) read with a spring micrometer, calibrated per ASTM D4417 Method C. Surface comparators per ISO 8503-1 provide rapid visual reference.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Does Henglihong supply abrasive blasting media internationally?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes. Jiangsu Henglihong Technology Co., Ltd. manufactures and exports aluminum oxide, garnet, glass bead, steel grit, and steel shot to industrial buyers across more than 40 countries. Sample programs and batch certification are available on request.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script><\/div>","protected":false},"excerpt":{"rendered":"<p>Surface Finishing \u00b7 Pillar Guide Last updated \u00b7 May 2026  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13161,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-13154","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/comments?post=13154"}],"version-history":[{"count":4,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13154\/revisions"}],"predecessor-version":[{"id":13244,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13154\/revisions\/13244"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/13161"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=13154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=13154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=13154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}