{"id":8493,"date":"2026-03-31T10:58:45","date_gmt":"2026-03-31T02:58:45","guid":{"rendered":"https:\/\/www.honorpigment.com\/en\/pigment-yellow-151-hp-yellow-1618\/"},"modified":"2026-03-31T10:58:45","modified_gmt":"2026-03-31T02:58:45","slug":"pigment-yellow-151-hp-yellow-1618","status":"publish","type":"post","link":"https:\/\/www.honorpigment.com\/ar\/pigment-yellow-151-hp-yellow-1618\/","title":{"rendered":"Pigment Yellow 151 (PY151) Buyer Checklist: Specs, Fastness, and Qualification"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/03\/befc09c7-bc41-4348-b2c2-7dd4f0baf851.webp\" alt=\"Lab sample of Pigment Yellow 151 powder with color swatches for industrial coatings and plastics qualification\" class=\"wp-image-8492\" srcset=\"https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/03\/befc09c7-bc41-4348-b2c2-7dd4f0baf851.webp 1536w, https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/03\/befc09c7-bc41-4348-b2c2-7dd4f0baf851-300x200.webp 300w, https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/03\/befc09c7-bc41-4348-b2c2-7dd4f0baf851-18x12.webp 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n\n<p>When a formulation is close to final approval, the question isn\u2019t \u201cIs Pigment Yellow 151 a good pigment?\u201d It\u2019s: <strong>Is this specific grade consistent, documented, and stable in <em>our<\/em> \u0627\u0644\u0646\u0638\u0627\u0645<\/strong>\u2014at the heat, resin chemistry, and service conditions we ship?<\/p>\n\n\n\n<p>This short checklist is written for procurement and technical stakeholders qualifying <strong>Pigment Yellow 151 (PY151)<\/strong>\u2014specifically <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.honorpigment.com\/ar\/product\/hp-yellow-1618-pigment-yellow-151\/\"><strong>HP Yellow 1618<\/strong><\/a>\u2014for coatings, plastics, and solvent\/water-based inks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What buyers should confirm before approving a PY151 grade<\/h2>\n\n\n\n<p>Decision-stage qualification typically comes down to five buckets. If any one fails, you lose time in rework, re-approval, or customer color disputes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Fastness targets for your end-use (not generic \u201cgood properties\u201d)<\/h3>\n\n\n\n<p>PY151 is chosen for durability, but \u201cfastness\u201d still depends on <strong>how you use it<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Lightfastness and weathering<\/strong> for outdoor coatings and exposed plastics<\/p><\/li><li><p><strong>Heat stability<\/strong> for processing temperature (especially in polyolefins)<\/p><\/li><li><p><strong>Acid\/alkali resistance<\/strong> depending on substrate, additives, and service environment<\/p><\/li><li><p><strong>Migration\/bleed behavior<\/strong> in PVC and multi-layer systems<\/p><\/li>\n<\/ul>\n\n\n\n<p>A supplier\u2019s fastness table is a starting point. Your approval should be based on <strong>your resin + additives + processing profile<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2) Dispersion behavior and color development<\/h3>\n\n\n\n<p>In production, the cost of a pigment isn\u2019t the drum price\u2014it\u2019s the time to reach target strength and the risk of rejects. For PY151, confirm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Dispersibility in your typical mill\/base resin<\/p><\/li><li><p>Whether you need higher energy to reach stable tint strength<\/p><\/li><li><p>Rub-out \/ drawdown consistency across batches<\/p><\/li>\n<\/ul>\n\n\n\n<p>On the HP Yellow 1618 product page, Honor Pigments lists <strong>good dispersibility<\/strong> as an advantage. You still want to validate it in your own process window.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3) Batch-to-batch consistency and traceability<\/h3>\n\n\n\n<p>For approved vendor lists and dual-sourcing programs, what matters is repeatability:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Can the supplier provide <strong>batch-specific COA<\/strong> (not a generic sheet)?<\/p><\/li><li><p>Are lot numbers and test methods consistent across COAs?<\/p><\/li><li><p>Is there a clear change-control approach if raw materials or process conditions shift?<\/p><\/li>\n<\/ul>\n\n\n\n<p>This is where procurement and QC align: stable suppliers reduce re-qualification cycles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4) Documentation pack readiness<\/h3>\n\n\n\n<p>For global shipments and audits, the basics are non-negotiable:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SDS<\/strong> (Safety Data Sheet)<\/p><\/li><li><p><strong>TDS<\/strong> (Technical Data Sheet)<\/p><\/li><li><p><strong>COA<\/strong> (Certificate of Analysis) per batch<\/p><\/li>\n<\/ul>\n\n\n\n<p>If your market requires specific statements (REACH\/RoHS\/food contact, etc.), confirm them explicitly during inquiry. Don\u2019t assume.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5) Supply reliability and total landed cost (TCO)<\/h3>\n\n\n\n<p>Unit price is rarely the full story. Confirm early:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Packaging unit (bag size) and palletization<\/p><\/li><li><p>Lead time and typical shipping lane performance<\/p><\/li><li><p>Minimum order quantities (if applicable)<\/p><\/li><li><p>How quickly samples and documentation are delivered (this often controls your qualification timeline)<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Pigment Yellow 151 \/ HP Yellow 1618 specifications (quick reference)<\/h2>\n\n\n\n<p>Below is a quick reference based on <strong>Honor Pigments\u2019 HP Yellow 1618 (Pigment Yellow 151) technical data<\/strong> on their product page.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Chemical type<\/strong>: Benzimidazolone<\/p><\/li><li><p><strong>CAS<\/strong>: 31837-42-0<\/p><\/li><li><p><strong>C.I. name \/ constitution no.<\/strong>: Pigment Yellow 151 \/ 13980<\/p><\/li><li><p><strong>Physical form<\/strong>: Powder<\/p><\/li><li><p><strong>Heat stability<\/strong>: 260\u00b0C<\/p><\/li><li><p><strong>Light fastness (full shade \/ tint)<\/strong>: 8 \/ 7<\/p><\/li><li><p><strong>Weather resistance (full shade \/ tint)<\/strong>: 5 \/ 5<\/p><\/li><li><p><strong>Resistance to acid \/ alkali<\/strong>: 5 \/ 5<\/p><\/li><li><p><strong>Migration resistance (PVC)<\/strong>: 5<\/p><\/li><li><p><strong>Oil absorption<\/strong>: 55 g linseed oil \/ 100 g pigment<\/p><\/li><li><p><strong>pH<\/strong>: 5.0\u20138.0<\/p><\/li><li><p><strong>Volatile matter<\/strong>: 1% max<\/p><\/li><li><p><strong>Packaging<\/strong>: 10 kg per bag; 300 kg per pallet<\/p><\/li><li><p><strong>Shelf life<\/strong>: 5 years (cool, dry, ventilated storage)<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Fastness and durability: how to interpret the ratings in real systems<\/h2>\n\n\n\n<p>Fastness ratings are useful only if you tie them to real failure modes.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Heat stability<\/strong>: match the pigment\u2019s stability to your peak processing temperature and dwell time. For plastics (especially HDPE\/PP), validate color shift after thermal history that matches production.<\/p><\/li><li><p><strong>Lightfastness \/ weathering<\/strong>: confirm performance in your exact binder and exposure conditions. Outdoor durability is a <em>\u0627\u0644\u0646\u0638\u0627\u0645<\/em> property (pigment + binder + stabilizers + film build).<\/p><\/li><li><p><strong>Migration and bleed<\/strong>: for PVC and overprint\/overcoat systems, confirm that your topcoats and solvents don\u2019t pull color.<\/p><\/li>\n<\/ul>\n\n\n\n<p>For broader context on how <strong>organic yellow pigments<\/strong> are evaluated in coatings, PCI Magazine notes that <strong>Pigment Yellow 151 (benzimidazolone H4G)<\/strong> is associated with good performance (including weatherfastness) and is \u201cquite resistant to bleeding\u201d in comparative testing, while also noting that strong alkaline environments can be a risk factor for color shift in some contexts (see <a target=\"_blank\" rel=\"nofollow noopener\" class=\"link\" href=\"https:\/\/www.pcimag.com\/articles\/90449-evaluation-of-various-organic-color-pigments\"><strong>PCI Magazine\u2019s evaluation of organic color pigments<\/strong><\/a>).<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Pro Tip<\/strong>: If you\u2019re qualifying for an exterior coating or a high-heat plastic, lock your acceptance criteria as a short list (\u0394E tolerance, strength window, gloss\/flow impact, and migration\/bleed result). A broad \u201cfastness is good\u201d requirement is hard to enforce at incoming inspection.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Application fit: where PY151 is commonly used\u2014and where to be cautious<\/h2>\n\n\n\n<p>Honor Pigments positions HP Yellow 1618 for a wide range of applications, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Coatings<\/strong>: solvent-based and water-based paints, industrial coatings, coil coatings, automotive paints, wood coatings<\/p><\/li><li><p><strong>Plastics<\/strong>: PP, PE, PVC, PS\/SAN, ABS, PET, PBT, TPU, and more<\/p><\/li><li><p><strong>Printing inks<\/strong>: solvent-based and water-based inks<\/p><\/li>\n<\/ul>\n\n\n\n<p>The practical takeaway for buyers is this: <strong>PY151 is often selected when you need a clean greenish-yellow with durability<\/strong>\u2014but you still need to verify fit in your specific chemistry.<\/p>\n\n\n\n<p>A common caution flagged in third-party discussion is that <strong>strong alkaline conditions can increase the risk of shade shift<\/strong> for some organic pigment systems. If you\u2019re considering powder coatings or alkaline-curing environments, treat this as a \u201cverify early\u201d item rather than discovering it after scale-up.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qualification checklist: what to request and what to test<\/h2>\n\n\n\n<p>Keep qualification simple and auditable. Here\u2019s a procurement-friendly sequence that also works for R&amp;D\/QC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What to request from the supplier<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>A representative <strong>sample<\/strong> for your standard let-down \/ tint procedure<\/p><\/li><li><p><strong>TDS<\/strong> for the exact grade (HP Yellow 1618)<\/p><\/li><li><p><strong>SDS<\/strong> for your market(s)<\/p><\/li><li><p>A <strong>batch COA<\/strong> for the sample lot (ideally showing test methods and limits)<\/p><\/li><li><p>Packaging and logistics details (bag, pallet, labeling)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">What to test internally (typical decision-stage checks)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Shade and strength vs. your standard (including tint)<\/p><\/li><li><p>Heat history test matching your real process<\/p><\/li><li><p>Light\/weather exposure screening appropriate for your application<\/p><\/li><li><p>Migration\/bleed screening for PVC or multi-layer systems<\/p><\/li><li><p>Dispersion time\/energy vs. your current approved pigment<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>&#x26a0;&#xfe0f; Warning<\/strong>: Don\u2019t approve a pigment grade using only a supplier\u2019s generic fastness table. Approvals that skip system-specific testing are where \u201cbatch variation\u201d issues become expensive.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Next step: request the documentation pack and sampling<\/h2>\n\n\n\n<p>If you\u2019re qualifying <strong>Pigment Yellow 151 \/ HP Yellow 1618<\/strong> and want to speed up approval, the fastest path is to request the full documentation pack up front (SDS\/TDS\/COA), plus packaging, pricing, and lead time.<\/p>\n\n\n\n<p>You can <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.honorpigment.com\/ar\/contact-us\/\"><strong>contact Honor Pigments<\/strong><\/a> to request samples and documentation, or email <a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"link\" href=\"mailto:info@honorpigment.com\"><strong>info@honorpigment.com<\/strong><\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Specs and buyer checklist for Pigment Yellow 151 (HP Yellow 1618): fastness, heat stability, applications, and what to request before approval.<\/p>","protected":false},"author":2,"featured_media":8492,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/posts\/8493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/comments?post=8493"}],"version-history":[{"count":0,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/posts\/8493\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/media\/8492"}],"wp:attachment":[{"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/media?parent=8493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/categories?post=8493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.honorpigment.com\/ar\/wp-json\/wp\/v2\/tags?post=8493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}