{"id":12757,"date":"2026-04-07T02:50:41","date_gmt":"2026-04-07T02:50:41","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12757"},"modified":"2026-04-07T02:50:41","modified_gmt":"2026-04-07T02:50:41","slug":"custom-blasting-media-specifications-working-with-manufacturers-on-grit-grade","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/zh\/resource\/blog\/custom-blasting-media-specifications-working-with-manufacturers-on-grit-grade\/","title":{"rendered":"Custom Blasting Media Specifications: Working with Manufacturers on Grit &amp; Grade"},"content":{"rendered":"<!-- ============================================================\n     JIANGSU HENGLIHONG TECHNOLOGY CO., LTD.\n     Article E-3: Custom Blasting Media Specifications\n     Target URL: https:\/\/hlh-js.com\/resource\/blog\/custom-blasting-media-specifications-working-with-manufacturers-on-grit-grade\/\n     Last updated: April 2026\n     ============================================================ -->\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Custom Blasting Media Specifications: Working with Manufacturers on Grit & Grade\",\n            \"description\": \"How to define, communicate, and qualify custom abrasive blasting media specifications \\u2014 from initial RFQ through production approval and batch testing. Covers non-standard grit sizes, custom PSD blends, specialty chemistry, and qualification protocols. By Jiangsu Henglihong Technology Co., Ltd.\",\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            \"datePublished\": \"2026-04-01\",\n            \"dateModified\": \"2026-04-01\",\n            \"mainEntityOfPage\": {\n                \"@type\": \"WebPage\",\n                \"@id\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/custom-blasting-media-specifications-working-with-manufacturers-on-grit-grade\\\/\"\n            }\n        },\n        {\n            \"@type\": \"BreadcrumbList\",\n            \"itemListElement\": [\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 1,\n                    \"name\": \"Home\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 2,\n                    \"name\": \"Resources\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 3,\n                    \"name\": \"Blog\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 4,\n                    \"name\": \"Custom Blasting Media Specifications: Working with Manufacturers on Grit & Grade\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/custom-blasting-media-specifications-working-with-manufacturers-on-grit-grade\\\/\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"When does it make sense to request custom blasting media specifications?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Custom blasting media specifications make sense when: (1) standard catalog grit sizes do not achieve the required surface profile depth or finish quality; (2) an application requires a blend of two grit sizes to achieve a specific profile character (controlled peak height combined with defined base roughness); (3) purity or chemistry requirements exceed what standard grades provide; (4) an OEM or project specification defines a non-standard particle size distribution; or (5) the volume justifies production runs tailored to the exact specification rather than accepting nearest-standard-grade products. Custom specs are typically justified at annual volumes above 10\\u201320 tonnes for mineral abrasives.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What information does a manufacturer need to produce custom blasting media?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"To produce custom blasting media, a manufacturer needs: (1) media type and chemistry specification (e.g., brown aluminum oxide, minimum Al\\u2082O\\u2083 95%, maximum Fe\\u2082O\\u2083 2%); (2) particle size distribution specification \\u2014 defined as sieve analysis retention percentages at each sieve size, with upper and lower tolerance limits; (3) applicable sizing standard (FEPA, ANSI, SAE, or custom definition); (4) any special property requirements (hardness range, density, shape requirements); (5) required quality documentation (CoA parameters, test frequency, third-party testing requirements); and (6) annual volume estimate and delivery schedule.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n\n<style>\n.hlh-e3*,.hlh-e3*::before,.hlh-e3*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-e3{font-family:'Segoe UI',Arial,sans-serif;font-size:16px;line-height:1.8;color:#1a1a2e;max-width:960px;margin:0 auto;padding:0 16px 60px}\n.hlh-e3 .hlh-hero{background:linear-gradient(135deg,#1A5276 0%,#0d2d47 100%);border-radius:12px;padding:52px 44px;margin-bottom:48px;position:relative;overflow:hidden}\n.hlh-e3 .hlh-hero::before{content:'';position:absolute;top:-60px;right:-60px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,0.04)}\n.hlh-e3 .hlh-hero-label{display:inline-block;background:rgba(255,255,255,0.12);color:#AED6F1;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:4px 12px;border-radius:20px;margin-bottom:20px}\n.hlh-e3 .hlh-hero h1{font-size:clamp(24px,4vw,36px);font-weight:700;color:#fff;line-height:1.25;margin-bottom:18px;position:relative;z-index:1}\n.hlh-e3 .hlh-hero p{font-size:17px;color:#AED6F1;max-width:680px;position:relative;z-index:1;margin-bottom:28px}\n.hlh-e3 .hlh-hero-meta{display:flex;gap:24px;flex-wrap:wrap;position:relative;z-index:1}\n.hlh-e3 .hlh-hero-meta span{font-size:13px;color:rgba(255,255,255,0.6);display:flex;align-items:center;gap:6px}\n.hlh-e3 .hlh-hero-meta span::before{content:'\u25cf';color:#5DADE2;font-size:8px}\n.hlh-e3 .hlh-toc{background:#F4F6F8;border-left:4px solid #1A5276;border-radius:0 10px 10px 0;padding:28px 32px;margin-bottom:52px}\n.hlh-e3 .hlh-toc-title{font-size:15px;font-weight:700;color:#1A5276;text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px}\n.hlh-e3 .hlh-toc ol{padding-left:20px;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:4px 32px}\n.hlh-e3 .hlh-toc li{font-size:14px;line-height:1.6}\n.hlh-e3 .hlh-toc a{color:#1A5276;text-decoration:none;font-weight:500}\n.hlh-e3 h2{font-size:clamp(20px,3vw,26px);font-weight:700;color:#0d2d47;margin:52px 0 18px;padding-bottom:10px;border-bottom:3px solid #1A5276;scroll-margin-top:80px}\n.hlh-e3 h3{font-size:19px;font-weight:700;color:#1A5276;margin:34px 0 12px}\n.hlh-e3 p{margin-bottom:18px;color:#2c3e50}\n.hlh-e3 .hlh-lead{font-size:18px;color:#2c3e50;border-left:4px solid #5DADE2;padding-left:20px;margin-bottom:28px;line-height:1.7}\n.hlh-e3 .hlh-box{border-radius:10px;padding:22px 26px;margin:26px 0}\n.hlh-e3 .hlh-box-blue{background:#EBF5FB;border:1px solid #AED6F1}\n.hlh-e3 .hlh-box-green{background:#EAFAF1;border:1px solid #A9DFBF}\n.hlh-e3 .hlh-box-orange{background:#FEF9E7;border:1px solid #F9E79F}\n.hlh-e3 .hlh-box-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}\n.hlh-e3 .hlh-box-blue .hlh-box-title{color:#1A5276}\n.hlh-e3 .hlh-box-green .hlh-box-title{color:#1E8449}\n.hlh-e3 .hlh-box-orange .hlh-box-title{color:#B7770D}\n.hlh-e3 .hlh-box p,.hlh-e3 .hlh-box li{font-size:15px;color:#2c3e50;margin-bottom:6px}\n.hlh-e3 .hlh-box ul{padding-left:18px}\n.hlh-e3 .hlh-table-wrap{overflow-x:auto;margin:26px 0;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,0.07)}\n.hlh-e3 table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}\n.hlh-e3 thead tr{background:#1A5276;color:#fff}\n.hlh-e3 thead th{padding:12px 15px;text-align:left;font-weight:600;font-size:13px;white-space:nowrap}\n.hlh-e3 tbody tr:nth-child(even){background:#F4F8FB}\n.hlh-e3 tbody tr:nth-child(odd){background:#fff}\n.hlh-e3 tbody td{padding:10px 15px;border-bottom:1px solid #EAF0F6;color:#2c3e50;vertical-align:top}\n\/* Process flow *\/\n.hlh-e3 .process-steps{margin:28px 0}\n.hlh-e3 .process-step{display:flex;gap:18px;margin-bottom:22px;align-items:flex-start}\n.hlh-e3 .process-step-num{flex-shrink:0;width:36px;height:36px;background:#1A5276;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;margin-top:2px}\n.hlh-e3 .process-step-body h4{font-size:15px;font-weight:700;color:#0d2d47;margin:0 0 5px}\n.hlh-e3 .process-step-body p{font-size:14px;color:#5d6d7e;margin:0;line-height:1.6}\n.hlh-e3 .hlh-related{margin:48px 0 32px}\n.hlh-e3 .hlh-related-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#7f8c8d;margin-bottom:14px}\n.hlh-e3 .hlh-related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}\n.hlh-e3 .hlh-related-card{display:block;text-decoration:none;border:1px solid #D5E8F3;border-left:4px solid #1A5276;border-radius:0 10px 10px 0;padding:16px 18px;background:#fff;transition:background .2s}\n.hlh-e3 .hlh-related-card:hover{background:#EBF5FB}\n.hlh-e3 .hlh-related-card .rc-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:#5DADE2;margin-bottom:5px}\n.hlh-e3 .hlh-related-card .rc-title{font-size:13px;font-weight:600;color:#0d2d47;line-height:1.4}\n.hlh-e3 .hlh-cta{background:linear-gradient(135deg,#1A5276,#0d2d47);border-radius:12px;padding:38px 44px;text-align:center;margin:48px 0 32px}\n.hlh-e3 .hlh-cta h3{font-size:22px;color:#fff;margin:0 0 10px;font-weight:700}\n.hlh-e3 .hlh-cta p{color:#AED6F1;font-size:15px;margin:0 0 22px}\n.hlh-e3 .hlh-cta a{display:inline-block;background:#fff;color:#1A5276;font-size:14px;font-weight:700;padding:12px 30px;border-radius:6px;text-decoration:none}\n.hlh-e3 .hlh-cta a:hover{background:#AED6F1}\n.hlh-e3 .hlh-faq{margin:26px 0}\n.hlh-e3 .hlh-faq-item{border:1px solid #D5E8F3;border-radius:8px;margin-bottom:10px;overflow:hidden}\n.hlh-e3 .hlh-faq-q{width:100%;background:#F4F8FB;border:none;cursor:pointer;text-align:left;padding:15px 18px;font-size:15px;font-weight:600;color:#0d2d47;display:flex;justify-content:space-between;align-items:center;gap:12px}\n.hlh-e3 .hlh-faq-q:hover{background:#EBF5FB}\n.hlh-e3 .hlh-faq-arrow{flex-shrink:0;width:20px;height:20px;background:#1A5276;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;transition:transform .3s}\n.hlh-e3 .hlh-faq-item.open .hlh-faq-arrow{transform:rotate(180deg)}\n.hlh-e3 .hlh-faq-a{display:none;padding:15px 18px;font-size:14px;color:#2c3e50;line-height:1.7;border-top:1px solid #D5E8F3;background:#fff}\n.hlh-e3 .hlh-faq-item.open .hlh-faq-a{display:block}\n.hlh-e3 a.hlh-link{color:#1A5276;font-weight:600;text-decoration:underline;text-underline-offset:3px}\n.hlh-e3 a.hlh-link:hover{color:#2980B9}\n.hlh-e3 hr{border:none;border-top:1px solid #EAF0F6;margin:44px 0}\n.hlh-e3 ul,.hlh-e3 ol{padding-left:22px;margin-bottom:18px}\n.hlh-e3 li{margin-bottom:7px;color:#2c3e50;font-size:15px}\n.hlh-e3 strong{color:#0d2d47}\n@media(max-width:640px){.hlh-e3 .hlh-hero{padding:34px 22px}.hlh-e3 .hlh-cta{padding:30px 22px}}\n<\/style>\n\n<div class=\"hlh-e3\">\n\n  <div class=\"hlh-hero\">\n    <div class=\"hlh-hero-label\">Sourcing &amp; Procurement<\/div>\n    <h1>Custom Blasting Media Specifications: Working with Manufacturers on Grit &amp; Grade<\/h1>\n    <p>How to define, communicate, and qualify custom abrasive blasting media specifications \u2014 from initial requirements analysis through RFQ, production trials, qualification testing, and ongoing batch verification for non-standard grit sizes, blended grades, and specialty chemistry.<\/p>\n    <div class=\"hlh-hero-meta\">\n      <span>Published April 2026<\/span>\n      <span>By Jiangsu Henglihong Technology Co., Ltd.<\/span>\n      <span>~2,300 words \u00b7 11 min read<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"hlh-toc\">\n    <div class=\"hlh-toc-title\">Table of Contents<\/div>\n    <ol>\n      <li><a href=\"#when-custom\">When to Request Custom Specifications<\/a><\/li>\n      <li><a href=\"#types-of-custom\">Types of Custom Specifications<\/a><\/li>\n      <li><a href=\"#defining-spec\">How to Define a Custom Specification<\/a><\/li>\n      <li><a href=\"#psd-specification\">Writing a PSD Specification<\/a><\/li>\n      <li><a href=\"#rfq-to-approval\">From RFQ to Production Approval: The Full Process<\/a><\/li>\n      <li><a href=\"#qualification\">Qualification Testing Protocol<\/a><\/li>\n      <li><a href=\"#ongoing-control\">Ongoing Batch Quality Control<\/a><\/li>\n      <li><a href=\"#pricing\">Custom Spec Pricing Considerations<\/a><\/li>\n      <li><a href=\"#henglihong-custom\">Working with Jiangsu Henglihong Technology<\/a><\/li>\n      <li><a href=\"#faq\">Frequently Asked Questions<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"when-custom\">When to Request Custom Specifications<\/h2>\n  <p class=\"hlh-lead\">Standard catalog abrasive blasting media covers the vast majority of industrial applications. But a significant minority of precision engineering operations, specialty process industries, and high-value manufacturing applications have requirements that standard grades cannot satisfy \u2014 either because the required particle size falls between standard grades, because a blend of sizes is needed for a specific surface character, or because purity or chemistry requirements exceed standard production specifications.<\/p>\n  <p>Custom media specifications become economically justifiable when one or more of the following conditions apply:<\/p>\n  <ul>\n    <li><strong>Surface profile specification gap:<\/strong> The standard grit sizes nearest to the requirement consistently produce profiles either marginally too deep or too shallow for the coating or bonding specification. A custom intermediate grit size fills the gap without requiring process parameter workarounds.<\/li>\n    <li><strong>Blend specification:<\/strong> A specific combination of coarse and fine particles achieves a unique surface character \u2014 controlled peak height with defined valley depth \u2014 that neither component alone can produce.<\/li>\n    <li><strong>Purity requirement:<\/strong> A process specification (e.g., medical device substrate preparation, semiconductor-grade surface treatment) requires purity levels \u2014 minimum Al\u2082O\u2083 99.5%, maximum Fe\u2082O\u2083 0.05% \u2014 that exceed what standard grades provide.<\/li>\n    <li><strong>OEM or project-specific PSD:<\/strong> A customer or project specification defines the acceptable particle size distribution with tighter tolerance bands than the applicable FEPA or ANSI standard allows.<\/li>\n    <li><strong>Regulatory or certification requirement:<\/strong> A specific industry certification (aerospace OEM approval, military specification) defines media requirements that cannot be met by standard commercially-available grades.<\/li>\n  <\/ul>\n  <div class=\"hlh-box hlh-box-orange\">\n    <div class=\"hlh-box-title\">Volume Threshold for Custom Specs<\/div>\n    <p>Custom specification production requires dedicated production runs with additional sieving, quality testing, and documentation. This typically increases per-tonne cost by 15\u201340% compared to standard grades, depending on how different the custom spec is from the manufacturer&#8217;s normal production. Custom specs are generally economically justified at annual volumes above 10\u201320 tonnes for mineral abrasives (aluminum oxide, silicon carbide) and 20\u201350 tonnes for steel media. Below these thresholds, the premium for custom production often exceeds the value of the specification advantage.<\/p>\n  <\/div>\n\n  <h2 id=\"types-of-custom\">Types of Custom Specifications<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Custom Spec Type<\/th><th>\u8bf4\u660e<\/th><th>Example Application<\/th><th>Typical Lead Time Premium<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td><strong>Non-standard grit size<\/strong><\/td><td>Particle size distribution between or outside standard FEPA\/ANSI grades<\/td><td>FEPA F54 (between F46 and F60) for a specific profile range<\/td><td>+1\u20132 weeks<\/td><\/tr>\n        <tr><td><strong>Tighter PSD tolerance<\/strong><\/td><td>Standard grade size range but with narrower \u00b1tolerance on D50 and D90<\/td><td>Precision optical component surface preparation requiring \u00b15% PSD control<\/td><td>+1\u20133 weeks<\/td><\/tr>\n        <tr><td><strong>Grit size blend<\/strong><\/td><td>Controlled mix of two or more standard grades to achieve a defined bimodal or broad PSD<\/td><td>Shot\/grit blend for structural steel \u2014 60% G-50 grit + 40% S-330 shot<\/td><td>+0\u20131 weeks (mixing only)<\/td><\/tr>\n        <tr><td><strong>Elevated purity chemistry<\/strong><\/td><td>Higher minimum purity or lower maximum contaminant than standard grade<\/td><td>White aluminum oxide, min Al\u2082O\u2083 99.8%, max Fe\u2082O\u2083 0.05% for medical device prep<\/td><td>+2\u20134 weeks<\/td><\/tr>\n        <tr><td><strong>Custom packaging configuration<\/strong><\/td><td>Non-standard packaging size, labeling, or identification marking<\/td><td>Custom 15 kg bags with customer product code and barcode for automated inventory<\/td><td>+1\u20132 weeks<\/td><\/tr>\n        <tr><td><strong>Proprietary specification<\/strong><\/td><td>Full OEM\/project-defined specification with customer-controlled test methods<\/td><td>Aerospace OEM-approved media per customer&#8217;s internal material spec number<\/td><td>+4\u20138 weeks (full qualification)<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h2 id=\"defining-spec\">How to Define a Custom Specification<\/h2>\n  <p>A well-defined custom specification document contains five elements: chemistry requirements, particle size distribution requirements, physical property requirements, quality testing requirements, and approval\/traceability requirements. Each element must be specified with both a nominal target value and acceptance tolerance limits \u2014 without tolerance limits, a specification is not enforceable.<\/p>\n\n  <h3>Chemistry Specification<\/h3>\n  <p>For aluminum oxide: minimum Al\u2082O\u2083 content (%), maximum Fe\u2082O\u2083 content (%), maximum SiO\u2082 content (%), maximum moisture (%), and any other specific elemental limits. For silicon carbide: minimum SiC (%), maximum free silicon, maximum free carbon. For glass beads: confirm lead-free status and any regulated element limits (e.g., no added heavy metals). For steel media: carbon content range, manganese range, hardness (HRC), and any alloying element requirements.<\/p>\n\n  <h3>Physical Property Requirements<\/h3>\n  <p>Hardness (Mohs or Vickers\/Knoop), bulk density (g\/cm\u00b3 or kg\/m\u00b3), shape (sphericity for glass beads \u2014 e.g., minimum 90% intact spheres per MIL-G-9954A), and any friability index requirements if media durability under repeated cycling is specified.<\/p>\n\n  <h2 id=\"psd-specification\">Writing a Particle Size Distribution (PSD) Specification<\/h2>\n  <p>The PSD specification is the most technically complex element of a custom media specification. It defines the acceptable range of particle sizes in the product and must be expressed in a form that a manufacturer can test against using calibrated sieves per the applicable standard.<\/p>\n  <p>A complete PSD specification for custom media should include:<\/p>\n  <ul>\n    <li><strong>Applicable sieve series:<\/strong> Specify the national or international standard governing the sieve sizes used (ISO 3310-1 \/ ASTM E11 \/ JIS Z8801).<\/li>\n    <li><strong>Sieve sizes and retention limits:<\/strong> For each sieve in the test series, specify the minimum and maximum % retained (by mass). This defines the shape and width of the particle size distribution curve.<\/li>\n    <li><strong>D50 (median particle size):<\/strong> The particle size at which 50% of the sample (by mass) passes through. Usually specified as a target value \u00b1 tolerance (e.g., 300 \u00b5m \u00b1 25 \u00b5m).<\/li>\n    <li><strong>D10 and D90:<\/strong> The particle sizes at which 10% and 90% of the sample passes, defining the distribution width. Tighter D10\/D90 tolerances produce more consistent blasting results but require more precise production control.<\/li>\n    <li><strong>Maximum oversize:<\/strong> The maximum particle size permitted in the product \u2014 anything above this is rejected. Critical for preventing damage to precision surfaces by occasional oversized particles.<\/li>\n    <li><strong>Maximum fines:<\/strong> The maximum percentage of particles below a defined fine-end cutoff \u2014 excessive fines reduce blasting efficiency and increase dust generation.<\/li>\n  <\/ul>\n  <div class=\"hlh-box hlh-box-blue\">\n    <div class=\"hlh-box-title\">Example: Custom PSD Specification for Brown Aluminum Oxide &#8220;F54-HLH&#8221;<\/div>\n    <p><strong>Chemistry:<\/strong> Al\u2082O\u2083 \u2265 95.0%, Fe\u2082O\u2083 \u2264 1.5%, SiO\u2082 \u2264 1.0%, moisture \u2264 0.1%<br>\n    <strong>Sieve analysis (ISO 3310-1):<\/strong><br>\n    \u2014 600 \u00b5m sieve: 0% retained (no oversize)<br>\n    \u2014 500 \u00b5m sieve: max 5% retained<br>\n    \u2014 425 \u00b5m sieve: 10\u201325% retained<br>\n    \u2014 355 \u00b5m sieve: 40\u201360% retained (D50 target zone)<br>\n    \u2014 300 \u00b5m sieve: 25\u201345% retained<br>\n    \u2014 250 \u00b5m sieve: max 10% retained<br>\n    \u2014 Pan (&lt;250 \u00b5m): max 5% (fines limit)<br>\n    <strong>D50 target:<\/strong> 340 \u00b5m \u00b1 20 \u00b5m<br>\n    <strong>\u786c\u5ea6<\/strong> Mohs 9.0 min (confirm by Knoop test if critical)<\/p>\n  <\/div>\n\n  <h2 id=\"rfq-to-approval\">From RFQ to Production Approval: The Full Process<\/h2>\n\n  <div class=\"process-steps\">\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">1<\/div>\n      <div class=\"process-step-body\">\n        <h4>Submit Custom Specification RFQ<\/h4>\n        <p>Provide the manufacturer with your full written specification document, annual volume estimate, delivery schedule, packaging requirement, and required documentation package. Request: technical feasibility confirmation, lead time estimate, unit price indication, and minimum order quantity for custom spec production.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">2<\/div>\n      <div class=\"process-step-body\">\n        <h4>Technical Feasibility Review<\/h4>\n        <p>The manufacturer evaluates whether the specification is achievable within their production equipment capability. Critical gating points: Is the target PSD achievable with their sieving equipment precision? Does the chemistry specification require raw material selection beyond standard supply? Can the required documentation be generated from their existing testing capability?<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">3<\/div>\n      <div class=\"process-step-body\">\n        <h4>Pre-Production Sample Lot<\/h4>\n        <p>The manufacturer produces a small trial batch (typically 100\u2013500 kg) to the target specification. This lot is tested internally against the specification and a CoA generated. The sample lot is shipped to the customer for independent qualification testing.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">4<\/div>\n      <div class=\"process-step-body\">\n        <h4>Customer Qualification Testing<\/h4>\n        <p>Customer conducts physical verification: independent sieve analysis, chemical analysis (if required), and most importantly \u2014 production blast trials under actual process conditions. Surface profiles, cleanliness grades, and any downstream process metrics (coating adhesion, bond strength) are measured and compared to specification.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">5<\/div>\n      <div class=\"process-step-body\">\n        <h4>Specification Revision (if required)<\/h4>\n        <p>If qualification testing reveals that the specification needs adjustment \u2014 profile too shallow, chemistry marginal, PSD needs recentering \u2014 the specification document is revised and a second pre-production sample may be required. This iteration cycle is normal; budget 1\u20132 iterations for complex specifications.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">6<\/div>\n      <div class=\"process-step-body\">\n        <h4>Production Approval and First Commercial Order<\/h4>\n        <p>Once the pre-production sample has been qualified, a formal approval document is issued \u2014 either a customer-signed approval form or a written purchase order referencing the approved specification document. The manufacturer records the approved specification as a controlled production standard with the customer&#8217;s reference number.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"process-step\">\n      <div class=\"process-step-num\">7<\/div>\n      <div class=\"process-step-body\">\n        <h4>Ongoing Batch Verification<\/h4>\n        <p>For each production batch shipped against the custom specification, the manufacturer generates a batch CoA confirming conformance to all specification parameters. The customer should conduct periodic incoming inspection (frequency depends on criticality and supplier track record) to verify ongoing conformance.<\/p>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <h2 id=\"qualification\">Qualification Testing Protocol<\/h2>\n  <p>A robust qualification test for custom abrasive blasting media should verify four dimensions of specification conformance:<\/p>\n\n  <h3>1. Chemical \/ Compositional Verification<\/h3>\n  <p>Independent chemical analysis of the sample lot using XRF (X-ray fluorescence) or wet chemical analysis to confirm major element composition and contaminant levels against specification. For free silica content, XRD (X-ray diffraction) analysis is required for quantitative crystalline silica determination.<\/p>\n\n  <h3>2. Particle Size Distribution Verification<\/h3>\n  <p>Sieve analysis using calibrated test sieves per the applicable standard. Calculate D10, D50, and D90 from the sieve analysis data. Compare against specification limits. This is the most frequently non-conforming parameter in custom media supply \u2014 always verify PSD independently rather than relying solely on the manufacturer&#8217;s CoA.<\/p>\n\n  <h3>3. Blasting Performance Verification<\/h3>\n  <p>Blast a series of test panels (minimum 3 panels per test condition) using the custom media under production-representative conditions. Measure: surface cleanliness grade (visual assessment per ISO 8501-1), surface profile Ra and Rz (contact profilometer or replica tape), and profile character (visual assessment of peak morphology). Compare against the surface profile target that motivated the custom specification request.<\/p>\n\n  <h3>4. Downstream Process Verification<\/h3>\n  <p>For applications where the blasted surface feeds directly into a critical downstream process (coating application, thermal spray, adhesive bonding), verify that the custom media&#8217;s surface preparation outcome meets the downstream process requirement. For coating applications: apply the coating system to qualified test panels and conduct pull-off adhesion testing (ASTM D4541) after the required cure period. For bonding applications: prepare and test bonded joint specimens.<\/p>\n\n  <h2 id=\"ongoing-control\">Ongoing Batch Quality Control<\/h2>\n  <p>Once a custom specification is qualified and in production, maintaining ongoing batch conformance requires a systematic approach. Key elements:<\/p>\n  <ul>\n    <li><strong>Batch CoA review:<\/strong> Review the manufacturer&#8217;s batch CoA for every delivery against the specification limits. Flag any out-of-specification values immediately \u2014 do not use non-conforming media in production without investigation and disposition.<\/li>\n    <li><strong>Periodic independent incoming inspection:<\/strong> Conduct independent sieve analysis and chemical analysis on a frequency basis (e.g., every 5th batch, or every 6 months for low-volume operations). Frequency can be reduced as the supplier&#8217;s conformance track record builds.<\/li>\n    <li><strong>Process output monitoring:<\/strong> Monitor surface profile measurements from production blasting as an ongoing indicator of media condition. A shift in profile depth without process parameter changes indicates either media degradation (reclaim circuit issue) or batch-to-batch variation in the incoming media.<\/li>\n  <\/ul>\n\n  <h2 id=\"pricing\">Custom Specification Pricing Considerations<\/h2>\n  <p>Custom specifications command price premiums over standard grades for legitimate reasons: dedicated production runs require manufacturing setup time; tighter PSD control requires more frequent sieve changes and higher material rejection rates; enhanced documentation requires additional testing time. Typical custom spec premiums:<\/p>\n  <ul>\n    <li>Non-standard grit size (between standard grades): 10\u201325% premium over nearest standard grade<\/li>\n    <li>Tighter PSD tolerance (\u00b15% vs standard \u00b110\u201315%): 15\u201335% premium<\/li>\n    <li>Elevated purity chemistry: 20\u201350% premium depending on purity level required<\/li>\n    <li>Full OEM qualification with third-party testing: 30\u201360% premium plus qualification cost<\/li>\n  <\/ul>\n  <p>These premiums are economically justified when the custom specification delivers measurable downstream value: reduced reject rate, improved coating adhesion performance, eliminated rework costs, or compliance with mandatory project specifications. When evaluating whether to pursue a custom spec, calculate the value of the downstream improvement against the total incremental cost of the custom specification including qualification investment.<\/p>\n\n  <h2 id=\"henglihong-custom\">Working with Jiangsu Henglihong Technology<\/h2>\n  <p>Jiangsu Henglihong Technology has developed custom specifications for customers in aerospace MRO, precision engineering, semiconductor manufacturing, and offshore coating projects across more than 30 countries. Our custom specification capabilities cover all four of our product lines \u2014 aluminum oxide, silicon carbide, glass beads, and steel shot\/grit \u2014 with in-house XRF analysis, calibrated sieve analysis lab, and dedicated production scheduling for custom spec orders.<\/p>\n  <p>Our standard custom specification development process includes: technical feasibility review within 5 business days of receiving a specification document; pre-production sample lot within 3\u20135 weeks of feasibility confirmation; and full batch CoA and PSD documentation for every production order against approved custom specifications.<\/p>\n  <p>For qualification samples, quality documentation requirements, and volume pricing for custom specifications, contact our technical sales team. For standard bulk ordering information: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/bulk-abrasive-blasting-media-packaging-options-moq-logistics\/\" target=\"_blank\" rel=\"noopener\">Bulk Abrasive Blasting Media: Packaging Options, MOQ &amp; Logistics<\/a>. For supplier evaluation criteria: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-suppliers-manufacturers-how-to-evaluate-source\/\" target=\"_blank\" rel=\"noopener\">How to Evaluate &amp; Source Abrasive Blasting Media Suppliers<\/a>.<\/p>\n\n  <div class=\"hlh-cta\">\n    <h3>Discuss Your Custom Specification with Our Technical Team<\/h3>\n    <p>Jiangsu Henglihong Technology welcomes custom specification inquiries for aluminum oxide, silicon carbide, glass beads, and steel shot\/grit. Provide your target particle size range, chemistry requirements, and application details \u2014 our engineers will confirm feasibility and timeline within 5 business days.<\/p>\n    <a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Submit a Custom Specification Inquiry<\/a>\n  <\/div>\n\n  <hr>\n\n  <h2 id=\"faq\">Frequently Asked Questions<\/h2>\n  <div class=\"hlh-faq\">\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhE3Toggle(this)\">When does it make sense to request custom blasting media specifications?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Custom specifications are justified when: standard grades don&#8217;t achieve the required surface profile; a blend is needed for a specific surface character; purity exceeds standard grade; an OEM or project spec defines non-standard PSD; or annual volume (10\u201320+ tonnes for mineral abrasives) justifies the premium. Custom specs typically add 15\u201360% cost over standard grades \u2014 verify the downstream value justifies this premium before pursuing.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhE3Toggle(this)\">What information does a manufacturer need for custom blasting media?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">A manufacturer needs: (1) media type and chemistry limits; (2) full PSD specification with sieve analysis requirements, D50 target, and D10\/D90 limits; (3) physical property requirements (hardness, density, shape); (4) quality documentation requirements (CoA parameters, test frequency, third-party testing); and (5) annual volume and delivery schedule. The PSD specification is the most critical element \u2014 define it with specific sieve retention limits and tolerances, not just a nominal grit size number.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhE3Toggle(this)\">How long does custom media specification approval take?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">A typical timeline: technical feasibility review 3\u20135 days; pre-production sample production 3\u20135 weeks; customer qualification testing 2\u20134 weeks; specification revision and second sample (if needed) 3\u20135 weeks; production approval 1 week. Total: 10\u201318 weeks from RFQ to first commercial production order approval. Budget for 1\u20132 iteration cycles in the qualification phase for complex specifications.<\/div>\n    <\/div>\n  <\/div>\n\n  <hr>\n\n  <div class=\"hlh-related\">\n    <div class=\"hlh-related-title\">Related Guides in This Series<\/div>\n    <div class=\"hlh-related-grid\">\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-complete-guide-to-types-properties-selection\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Complete Guide<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media: Complete Guide to Types, Properties &amp; Selection<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-suppliers-manufacturers-how-to-evaluate-source\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Sourcing &amp; Procurement<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media Suppliers &amp; Manufacturers: How to Evaluate &amp; Source<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/bulk-abrasive-blasting-media-packaging-options-moq-logistics\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Sourcing &amp; Procurement<\/div>\n        <div class=\"rc-title\">Bulk Abrasive Blasting Media: Packaging Options, MOQ &amp; Logistics<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-grit-size-mesh-size-guide-how-to-read-convert\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Blasting Media Grit Size &amp; Mesh Size Guide: How to Read &amp; Convert<\/div>\n      <\/a>\n    <\/div>\n  <\/div>\n\n<\/div>\n\n<script>\n(function(){\n  function hlhE3Toggle(btn){\n    var item=btn.closest('.hlh-faq-item');\n    var isOpen=item.classList.contains('open');\n    document.querySelectorAll('.hlh-e3 .hlh-faq-item').forEach(function(el){el.classList.remove('open');});\n    if(!isOpen){item.classList.add('open');}\n  }\n  window.hlhE3Toggle=hlhE3Toggle;\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Sourcing &amp; Procurement Custom Blasting Media Specifications: Working with Manufacturers  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12785,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/posts\/12757","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/comments?post=12757"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/posts\/12757\/revisions"}],"predecessor-version":[{"id":12759,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/posts\/12757\/revisions\/12759"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/media\/12785"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/media?parent=12757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/categories?post=12757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/zh\/wp-json\/wp\/v2\/tags?post=12757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}