{"id":13506,"date":"2026-06-24T06:37:10","date_gmt":"2026-06-24T06:37:10","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13506"},"modified":"2026-06-24T06:37:10","modified_gmt":"2026-06-24T06:37:10","slug":"abrasive-media-hardness-comparison-mohs-scale-what-it-means-for-blasting","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/abrasive-media-hardness-comparison-mohs-scale-what-it-means-for-blasting\/","title":{"rendered":"Abrasive Media Hardness Comparison: Mohs Scale &amp; What It Means for Blasting"},"content":{"rendered":"<style>\n.hlh-p{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;color:#2d3748;line-height:1.78;max-width:900px;margin:0 auto;font-size:1rem}\n.hlh-p *{box-sizing:border-box}\n.hlh-p p{margin:0 0 1.3rem}\n.hlh-p h1{font-size:2.25rem;font-weight:800;color:#1a3456;margin:0 0 1.25rem;line-height:1.25}\n.hlh-p h2{font-size:1.65rem;font-weight:700;color:#1a3456;margin:2.75rem 0 1rem;padding-bottom:.55rem;border-bottom:3px solid #d86e18}\n.hlh-p h3{font-size:1.15rem;font-weight:600;color:#1a3456;margin:1.6rem 0 .5rem}\n.hlh-p ul,.hlh-p ol{margin:0 0 1.25rem;padding-left:1.5rem}\n.hlh-p li{margin:.35rem 0}\n.hlh-p strong{font-weight:600;color:#1a3456}\n.hlh-p a{color:#d86e18;text-decoration:none}\n.hlh-p a:hover{text-decoration:underline;color:#b55c14}\n.hlh-toc{background:#f7f9fc;border:1px solid #dde4ef;border-left:4px solid #d86e18;border-radius:8px;padding:1.4rem 1.75rem;margin:2rem 0}\n.hlh-toc-ttl{font-size:.76rem;text-transform:uppercase;letter-spacing:.09em;color:#7a8aa0;font-weight:700;margin:0 0 .75rem}\n.hlh-toc ol{margin:0;padding-left:1.2rem}\n.hlh-toc li{margin:.3rem 0;font-size:.9rem}\n.hlh-toc a{color:#1a3456;font-weight:500;text-decoration:none}\n.hlh-toc a:hover{color:#d86e18}\n.hlh-callout{background:#eef5ff;border-left:4px solid #3b82f6;border-radius:6px;padding:1rem 1.3rem;margin:1.5rem 0}\n.hlh-callout p{margin:0;font-size:.9rem;color:#1e3a5f;line-height:1.65}\n.hlh-notice{background:#fff8ed;border-left:4px solid #d86e18;border-radius:6px;padding:1rem 1.3rem;margin:1.5rem 0}\n.hlh-notice p{margin:0;font-size:.9rem;color:#7a4a10;line-height:1.65}\n\/* Mohs bar chart *\/\n.hlh-bars{margin:1.75rem 0}\n.hlh-bar-row{display:flex;align-items:center;gap:.75rem;margin:.55rem 0}\n.hlh-bar-label{font-size:.82rem;color:#3a4e68;font-weight:500;min-width:160px;text-align:right;flex-shrink:0}\n.hlh-bar-track{flex:1;background:#eef1f7;border-radius:4px;height:22px;position:relative;overflow:hidden}\n.hlh-bar-fill{height:100%;border-radius:4px;display:flex;align-items:center;padding-left:8px;font-size:.75rem;font-weight:700;color:#fff;white-space:nowrap}\n.hlh-bar-val{font-size:.8rem;color:#596a80;font-weight:600;min-width:50px}\n.hlh-twrap{overflow-x:auto;margin:1.5rem 0;border-radius:8px;border:1px solid #e5eaf2}\n.hlh-tbl{width:100%;border-collapse:collapse;font-size:.84rem;min-width:520px}\n.hlh-tbl thead th{background:#1a3456;color:#fff;padding:.75rem 1rem;text-align:left;font-weight:600;white-space:nowrap}\n.hlh-tbl tbody td{padding:.6rem 1rem;border-bottom:1px solid #eef1f7;color:#2d3748;vertical-align:top}\n.hlh-tbl tbody tr:last-child td{border-bottom:none}\n.hlh-tbl tbody tr:nth-child(even) td{background:#f8fafd}\n.hlh-tbl tbody tr:hover td{background:#edf4ff}\n.hlh-good{color:#15803d;font-weight:600}\n.hlh-fair{color:#b45309;font-weight:600}\n.hlh-flist{margin:1rem 0}\n.hlh-fitem{border:1px solid #e5eaf2;border-radius:8px;margin:.6rem 0;padding:1rem 1.25rem}\n.hlh-fq{font-weight:600;color:#1a3456;font-size:.93rem;margin:0 0 .5rem}\n.hlh-fa{font-size:.88rem;color:#5a6a80;margin:0;line-height:1.65}\n.hlh-cta{background:linear-gradient(130deg,#1a3456 0%,#2a508a 100%);border-radius:12px;padding:2.5rem 2rem;text-align:center;margin:3rem 0 1rem;color:#fff}\n.hlh-cta h2{color:#fff!important;border:none!important;margin:0 0 .75rem;font-size:1.45rem;padding:0!important}\n.hlh-cta p{color:rgba(255,255,255,.88);margin:0 0 1.5rem;font-size:1rem}\n.hlh-ctabtn{display:inline-block;background:#d86e18;color:#fff!important;padding:.8rem 2.25rem;border-radius:50px;font-weight:700;text-decoration:none!important;font-size:.95rem}\n.hlh-ctabtn:hover{background:#b55c14!important}\n@media(max-width:640px){.hlh-bar-label{min-width:110px;font-size:.75rem}.hlh-cta{padding:1.75rem 1.25rem}}\n<\/style>\n\n<div class=\"hlh-p\">\n<h1>Abrasive Media Hardness Comparison: Mohs Scale &amp; What It Means for Blasting<\/h1>\n\n<p>Hardness is the most fundamental property governing whether an abrasive media will cut a given substrate effectively \u2014 and whether it will do so without excessive media wear, equipment damage, or substrate distortion. An abrasive that is harder than its target cuts efficiently; one that approaches the same hardness as its target abrades inefficiently and breaks down rapidly; one that is softer than its target does not cut at all and simply deforms on impact. The Mohs hardness scale provides the reference framework for comparing abrasive media and substrate materials on a common basis.<\/p>\n\n<p>This guide explains the Mohs scale, how each principal abrasive media type ranks on it, how hardness interacts with toughness to determine real-world blasting performance, and how to use hardness data to make informed media selection decisions. For the complete media buying guide with full product specifications, see the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-media-supplies\/\" target=\"_blank\" rel=\"noopener\">Abrasive Media Supplies Buyer&#8217;s Guide<\/a>.<\/p>\n\n<div class=\"hlh-toc\">\n  <div class=\"hlh-toc-ttl\">Table of Contents<\/div>\n  <ol>\n    <li><a href=\"#moh-scale\">The Mohs Hardness Scale Explained<\/a><\/li>\n    <li><a href=\"#moh-media\">Abrasive Media Hardness Rankings<\/a><\/li>\n    <li><a href=\"#moh-substrate\">Common Substrate Hardness Reference<\/a><\/li>\n    <li><a href=\"#moh-vs-tough\">Hardness vs Toughness: Why Both Matter<\/a><\/li>\n    <li><a href=\"#moh-cutting\">Hardness Differential and Cutting Efficiency<\/a><\/li>\n    <li><a href=\"#moh-faq\">Questions fr\u00e9quemment pos\u00e9es<\/a><\/li>\n  <\/ol>\n<\/div>\n\n<h2 id=\"moh-scale\">The Mohs Hardness Scale Explained<\/h2>\n<p>The Mohs hardness scale was devised by German mineralogist Friedrich Mohs in 1812 as a practical field test for identifying minerals. It ranks ten reference minerals from 1 (talc, the softest) to 10 (diamond, the hardest) based on their ability to scratch each other. A material that can scratch a reference mineral is harder than it; a material that is scratched by a reference mineral is softer. The scale is ordinal \u2014 it indicates relative ranking \u2014 but not linear. The hardness difference between 9 and 10 (corundum to diamond) is far greater in absolute terms than the difference between 1 and 2 (talc to gypsum).<\/p>\n\n<p>The ten reference minerals on the Mohs scale:<\/p>\n<ol>\n  <li>Talc \u2014 fingernail can scratch it<\/li>\n  <li>Gypsum \u2014 fingernail barely scratches it<\/li>\n  <li>Calcite \u2014 copper coin can scratch it<\/li>\n  <li>Fluorite \u2014 steel knife barely scratches it<\/li>\n  <li>Apatite \u2014 steel knife scratches it<\/li>\n  <li>Orthoclase feldspar \u2014 steel file scratches it with difficulty<\/li>\n  <li>Quartz \u2014 scratches ordinary glass<\/li>\n  <li>Topaz \u2014 scratches quartz<\/li>\n  <li>Corundum (sapphire\/ruby) \u2014 scratches topaz<\/li>\n  <li>Diamond \u2014 scratches everything; scratched by nothing<\/li>\n<\/ol>\n\n<p>For abrasive media applications, the Mohs scale provides a quick comparative framework. The critical rule: <strong>abrasive must be at least 1.5\u20132 Mohs harder than the substrate to cut it productively.<\/strong> Below this differential, the abrasive abrades itself as much as the substrate, consuming media at high rates with low cutting efficiency.<\/p>\n\n<h2 id=\"moh-media\">Abrasive Media Hardness Rankings<\/h2>\n<p>The following bar chart and table rank all nine principal abrasive media types from softest to hardest on the Mohs scale:<\/p>\n\n<div class=\"hlh-bars\">\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Bicarbonate de sodium<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:25%;background:#93c5fd\">2.5<\/div><\/div>\n    <span class=\"hlh-bar-val\">2.5 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Plastic Grit (Urea\/Mel.)<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:33%;background:#6ee7b7\">3\u20134<\/div><\/div>\n    <span class=\"hlh-bar-val\">3\u20134 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Walnut Shell<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:37%;background:#6ee7b7\">3.5\u20134<\/div><\/div>\n    <span class=\"hlh-bar-val\">3.5\u20134 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Perles de verre<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:55%;background:#fcd34d\">5.5<\/div><\/div>\n    <span class=\"hlh-bar-val\">5.5 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Grenaille d'acier<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:56%;background:#fcd34d\">5\u20136<\/div><\/div>\n    <span class=\"hlh-bar-val\">5\u20136 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Copper Slag<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:65%;background:#fb923c\">6-7<\/div><\/div>\n    <span class=\"hlh-bar-val\">6\u20137 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Grain d'acier<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:75%;background:#fb923c\">7\u20138<\/div><\/div>\n    <span class=\"hlh-bar-val\">7\u20138 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Garnet (Almandine)<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:80%;background:#f87171\">7.5\u20138.5<\/div><\/div>\n    <span class=\"hlh-bar-val\">7.5\u20138.5 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Oxyde d'aluminium<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:90%;background:#dc2626\">9.0<\/div><\/div>\n    <span class=\"hlh-bar-val\">9.0 Mohs<\/span>\n  <\/div>\n  <div class=\"hlh-bar-row\">\n    <span class=\"hlh-bar-label\">Carbure de silicium<\/span>\n    <div class=\"hlh-bar-track\"><div class=\"hlh-bar-fill\" style=\"width:95%;background:#991b1b\">9.5<\/div><\/div>\n    <span class=\"hlh-bar-val\">9.5 Mohs<\/span>\n  <\/div>\n<\/div>\n\n<div class=\"hlh-twrap\">\n  <table class=\"hlh-tbl\">\n    <thead>\n      <tr><th>Media<\/th><th>Duret\u00e9 Mohs<\/th><th>Hardness Category<\/th><th>Key Implication for Blasting<\/th><\/tr>\n    <\/thead>\n    <tbody>\n      <tr><td>Bicarbonate de sodium<\/td><td>2.5<\/td><td>Very Soft<\/td><td>Gentle cleaning only; no profiling on any metal substrate<\/td><\/tr>\n      <tr><td>Plastic Grit (Urea \/ Melamine)<\/td><td>3\u20134<\/td><td>Soft<\/td><td>Strips coatings from aluminum and composites; no substrate material removal<\/td><\/tr>\n      <tr><td>Walnut Shell<\/td><td>3.5\u20134<\/td><td>Soft<\/td><td>Cleans delicate surfaces; no profiling on metal<\/td><\/tr>\n      <tr><td>Perles de verre<\/td><td>5.5<\/td><td>Medium-Soft<\/td><td>Peens and burnishes; cannot profile carbon or alloy steel<\/td><\/tr>\n      <tr><td>Grenaille d'acier<\/td><td>5\u20136 (HRC 40\u201351)<\/td><td>Medium<\/td><td>Peens and descales steel; produces low-depth smooth profile<\/td><\/tr>\n      <tr><td>Copper Slag<\/td><td>6-7<\/td><td>Medium-Hard<\/td><td>Profiles carbon steel; marginally effective on hard alloys<\/td><\/tr>\n      <tr><td>Grain d'acier<\/td><td>7\u20138 (HRC 54\u201365)<\/td><td>Hard<\/td><td>Aggressive profiling of all steel grades; Sa 3 capable<\/td><\/tr>\n      <tr><td>Garnet (Almandine)<\/td><td>7.5\u20138.5<\/td><td>Hard<\/td><td>Profiles most metals and stone; preferred for pipeline and marine<\/td><\/tr>\n      <tr><td>Oxyde d'aluminium<\/td><td>9.0<\/td><td>Very Hard<\/td><td>Profiles steel, aluminum, stainless, titanium, and ceramics<\/td><\/tr>\n      <tr><td>Carbure de silicium<\/td><td>9.5<\/td><td>Extremely Hard<\/td><td>Cuts glass, stone, hard ceramics; most productive on hardest substrates<\/td><\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<h2 id=\"moh-substrate\">Common Substrate Hardness Reference<\/h2>\n\n<div class=\"hlh-twrap\">\n  <table class=\"hlh-tbl\">\n    <thead>\n      <tr><th>Substrate Material<\/th><th>Approx. Mohs Hardness<\/th><th>Minimum Media Hardness Required<\/th><\/tr>\n    <\/thead>\n    <tbody>\n      <tr><td>Soft polymers \/ rubber<\/td><td>1\u20132<\/td><td>2.5+ (any abrasive)<\/td><\/tr>\n      <tr><td>Calcite \/ soft stone<\/td><td>3<\/td><td>4.5+<\/td><\/tr>\n      <tr><td>Aluminum alloys (soft)<\/td><td>2.5\u20133.5<\/td><td>No minimum for cleaning; 5+ for profiling<\/td><\/tr>\n      <tr><td>Zinc \/ soft brass<\/td><td>2.5\u20134<\/td><td>4.5+ for profiling<\/td><\/tr>\n      <tr><td>Mild carbon steel<\/td><td>4.5\u20135.5<\/td><td>7.0+ for profiling to Sa 2.5<\/td><\/tr>\n      <tr><td>Stainless steel (austenitic)<\/td><td>5.5\u20136.5<\/td><td>7.0+ for profiling<\/td><\/tr>\n      <tr><td>Cast iron<\/td><td>5\u20136<\/td><td>7.0+ for aggressive profiling<\/td><\/tr>\n      <tr><td>Standard float glass<\/td><td>5.5<\/td><td>7.5+ for etching; 9.0+ for productive cutting<\/td><\/tr>\n      <tr><td>Titanium alloys<\/td><td>6\u20136.5<\/td><td>8.0+ for profiling<\/td><\/tr>\n      <tr><td>Granite \/ hard stone<\/td><td>6-7<\/td><td>9.0+ for productive surface work<\/td><\/tr>\n      <tr><td>Hardened tool steel<\/td><td>7\u20138<\/td><td>9.0+ (Al\u2082O\u2083 minimum)<\/td><\/tr>\n      <tr><td>Tungsten carbide<\/td><td>9\u20139.5<\/td><td>9.5 SiC only; diamond for lapping<\/td><\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<h2 id=\"moh-vs-tough\">Hardness vs Toughness: Why Both Matter<\/h2>\n<p>Hardness and toughness are related but distinct properties, and understanding the difference prevents a common over-simplification in abrasive media selection: assuming that harder is always better.<\/p>\n<p><strong>Duret\u00e9<\/strong> (Mohs scale) measures resistance to scratching and surface penetration \u2014 relevant to cutting ability.<\/p>\n<p><strong>Toughness<\/strong> measures resistance to fracture under impact \u2014 relevant to reuse cycle count and breakdown rate.<\/p>\n<p>Silicon carbide (9.5 Mohs) is harder than aluminum oxide (9.0 Mohs) but more brittle \u2014 it fractures more readily under the repeated impact loads of blasting, giving it fewer reuse cycles per kilogram than Al\u2082O\u2083 despite its superior hardness. The self-sharpening behavior this produces (new cutting edges exposed at each fracture) partially compensates by maintaining cutting efficiency per impact \u2014 but the net result is that SiC is not automatically more economical than Al\u2082O\u2083 on substrates where both can cut effectively.<\/p>\n<p>Similarly, steel shot (Mohs 5\u20136) appears dramatically softer than garnet (Mohs 7.5\u20138.5) \u2014 yet steel shot delivers up to 3,000 reuse cycles against garnet&#8217;s 5\u201310, because the toughness of the metallic steel structure prevents the particle fracture that progressively reduces mineral abrasives to unusable fines. For more on how to factor both properties into media selection: <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-abrasive-blast-media-5-step-selection-framework\/\" target=\"_blank\" rel=\"noopener\">How to Choose Abrasive Blast Media: 5-Step Selection Framework<\/a>.<\/p>\n\n<h2 id=\"moh-cutting\">Hardness Differential and Cutting Efficiency<\/h2>\n<p>The practical cutting efficiency of an abrasive increases with the hardness differential between media and substrate, up to a point of diminishing returns. Key observations:<\/p>\n<ul>\n  <li>A differential of 1.5\u20132.0 Mohs is the practical minimum for productive blasting. Below this, the media abrades against the substrate without effective penetration, consuming media at high rate with low surface preparation output.<\/li>\n  <li>Between differentials of 2.0\u20134.0 Mohs, cutting efficiency is broadly proportional to differential \u2014 harder media cuts faster, holding other parameters constant.<\/li>\n  <li>Above differentials of 4.0+ Mohs, the substrate hardness becomes the limiting factor rather than the media hardness \u2014 using silicon carbide (9.5 Mohs) on mild steel (4.5 Mohs) cuts no faster than aluminum oxide (9.0 Mohs) on the same substrate, because the steel&#8217;s hardness limits how deep each particle penetrates regardless of which abrasive is used. The premium of SiC over Al\u2082O\u2083 is only justified when the substrate hardness approaches or exceeds Al\u2082O\u2083&#8217;s effective cutting threshold.<\/li>\n<\/ul>\n\n<div class=\"hlh-notice\">\n  <p><strong>Practical Implication:<\/strong> Do not over-specify abrasive hardness. Using SiC (9.5 Mohs, premium cost) on standard carbon steel (4.5\u20135.5 Mohs) delivers no performance advantage over garnet (7.5\u20138.5 Mohs) or Al\u2082O\u2083 (9.0 Mohs), but costs significantly more per kilogram. Reserve SiC for substrates where its exceptional hardness margin over the target material actually translates to a measurable performance improvement: glass, hard stone, ceramics, and corundum-based materials.<\/p>\n<\/div>\n\n<h2 id=\"moh-faq\">Questions fr\u00e9quemment pos\u00e9es<\/h2>\n<div class=\"hlh-flist\">\n\n  <div class=\"hlh-fitem\">\n    <div class=\"hlh-fq\">Why does steel grit (Mohs 7\u20138) profile steel (Mohs 4.5\u20135.5) faster than garnet (Mohs 7.5\u20138.5)?<\/div>\n    <p class=\"hlh-fa\">Counter-intuitively, garnet&#8217;s higher Mohs hardness does not translate to faster cutting on mild steel. The difference lies in specific gravity and therefore kinetic energy: steel grit has a specific gravity of approximately 7.8 g\/cm\u00b3 vs garnet&#8217;s 3.9\u20134.1 g\/cm\u00b3. At the same blast velocity, a steel grit particle carries approximately twice the kinetic energy of an equivalent-sized garnet particle. This higher impact energy drives the angular cutting edges deeper into the steel surface per impact, achieving a faster cut rate and deeper profile than garnet of equivalent or slightly higher Mohs hardness. Hardness determines whether cutting can occur at all; kinetic energy (mass \u00d7 velocity\u00b2) determines how deeply each particle penetrates per impact event.<\/p>\n  <\/div>\n\n  <div class=\"hlh-fitem\">\n    <div class=\"hlh-fq\">Can I use Mohs hardness to specify abrasive media in a procurement document?<\/div>\n    <p class=\"hlh-fa\">Mohs hardness is a useful reference point for media selection but is not precise enough to serve as a standalone procurement specification. The Mohs scale is ordinal and approximate \u2014 two minerals both rated at Mohs 7 can have meaningfully different absolute hardnesses and different blasting behaviors. For procurement documents, specify the applicable product standard (ASTM B-7 for garnet, SAE J827 for steel shot, FEPA F-series for aluminum oxide and SiC), the grade and grit size designation within that standard, and the performance parameters (particle size distribution D50 \u00b1 tolerance, chemical composition minimums) confirmed by COA. Mohs hardness is useful in buyer education and media selection discussion; it is not a substitute for dimensional and chemical specifications in a purchase order.<\/p>\n  <\/div>\n\n<\/div>\n\n<div class=\"hlh-cta\">\n  <h2>Select the Right Hardness Media for Your Application<\/h2>\n  <p>Henglihong supplies abrasive media from Mohs 3 (plastic grit) through Mohs 9.5 (silicon carbide). Technical team available to confirm correct hardness specification for your substrate and coating system.<\/p>\n  <a href=\"https:\/\/hlh-js.com\/contact\/\" class=\"hlh-ctabtn\" target=\"_blank\" rel=\"noopener\">Get a Free Technical Recommendation<\/a>\n<\/div>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Abrasive Media Hardness Comparison: Mohs Scale &amp; What It Means  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13508,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,177,138],"tags":[],"class_list":["post-13506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-material","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13506","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=13506"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13506\/revisions"}],"predecessor-version":[{"id":13509,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13506\/revisions\/13509"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/13508"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=13506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=13506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=13506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}