{"id":8377,"date":"2026-02-04T21:58:01","date_gmt":"2026-02-04T13:58:01","guid":{"rendered":"https:\/\/www.honorpigment.com\/en\/ultimate-guide-pigment-red-170-pr170-hp-red-2130\/"},"modified":"2026-02-27T14:24:50","modified_gmt":"2026-02-27T06:24:50","slug":"ultimate-guide-pigment-red-170-pr170-hp-red-2130","status":"publish","type":"post","link":"https:\/\/www.honorpigment.com\/sq\/ultimate-guide-pigment-red-170-pr170-hp-red-2130\/","title":{"rendered":"PR170 HP RED 2130: The Practical Guide to Pigment Red 170 for High\u2011Grade Coatings, Plastics, and Inks"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><\/figure>\r\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-8383\" src=\"https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/02\/image-3-300x200.webp\" alt=\"pigment red 170\" width=\"656\" height=\"437\" srcset=\"https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/02\/image-3-300x200.webp 300w, https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/02\/image-3-18x12.webp 18w, https:\/\/www.honorpigment.com\/wp-content\/uploads\/2026\/02\/image-3.webp 1536w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/><\/p>\r\n\r\n\r\n\r\n<p>If you formulate exterior coatings, engineer PP\/PA\/PC compounds, or specify printing inks, you\u2019ve likely short\u2011listed Pigment Red 170 more than once. This guide lays out how a high\u2011performance PR170 grade such as <a href=\"\/sq\/produkt\/hp-red-2130-pigment-red-170f3rk\/\">PR170 HP RED 2130<\/a> can serve as a single differentiator across systems by holding color under UV, heat, solvents, and processing stress\u2014while staying reproducible lot to lot. Every performance claim here is tied to recognizable methods (ISO\/ASTM) and realistic acceptance examples, so you can map it to your own internal standards.<\/p>\r\n\r\n\r\n\r\n<p>\u2014<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">The Single Differentiator: Durable, Stable Color Across Systems<\/h2>\r\n\r\n\r\n\r\n<p>When we say a single differentiator, we mean one integrated outcome: durable, stable color you can trust from lab to line. In practice, that\u2019s five things working together:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Outdoor weathering and lightfastness that remains credible in both full shade and 1:3 TiO2 tint.<\/p>\r\n<\/li>\r\n<li>\r\n<p>High\u2011heat color stability across common polymer windows (PA\/PC\/PP) without unacceptable hue drift after melt\/hold.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Low migration tendencies and practical solvent\/chemical resistance in coatings and inks.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Batch\u2011to\u2011batch chroma and hue consistency that shortens matching cycles and stabilizes QC.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Selectable transparency\/opacity options that support the hiding, gloss, and rheology targets of each system while dispersing cleanly.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Think of it this way: you\u2019re not chasing five different reds\u2014you\u2019re choosing one chemistry whose grade design and process controls allow you to meet five interlocking requirements.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Pigment Red 170 Fundamentals: Crystal Forms, Opacity vs Transparency<\/h2>\r\n\r\n\r\n\r\n<p>Pigment Red 170 (C.I. 12475) is a naphthol AS monoazo red known for multiple crystal forms and commercial variants. Opaque, yellow\u2011shade forms (often used for coatings and PVC) emphasize hiding and robust full\u2011shade weathering; transparent, bluish\u2011shade forms (favored in inks and packaging) emphasize clean tints and filtration. Peer\u2011reviewed work has shown that denser polymorphs (for example, \u03b3\u2011phase obtained via hydrothermal conversion) can improve thermal stability and flow while narrowing particle size distributions\u2014factors that influence tint strength, rheology, and color hold under heat. See the \u03b3\u2011phase conversion and property improvements documented in a 2023 open\u2011access study on PR170 crystalline transformations and kaolin surface modification in the RSC\/PMC literature: the authors quantified phase conversion conditions and linked microstructure to processing behavior (<a class=\"link\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10543990\/\" target=\"_blank\" rel=\"nofollow noopener\">peer\u2011reviewed \u03b3\u2011phase insights<\/a>).<\/p>\r\n\r\n\r\n\r\n<p>Two practical implications for formulators:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>For exterior coatings where hiding and long\u2011term durability matter, an opaque PR170 form with controlled particle architecture often gives stronger full\u2011shade weathering and solvent fastness.<\/p>\r\n<\/li>\r\n<li>\r\n<p>For high\u2011purity inks or fine tints where filtration and transparency matter, a transparent PR170 form supports cleaner undertone and easier dispersion, with the understanding that tint lightfastness is usually the limiting factor and must be validated.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">How We Prove It: Standardized Tests and Acceptance Examples<\/h2>\r\n\r\n\r\n\r\n<p>To keep discussions concrete, the table below maps common claims to widely used test methods and example parameters. Always align acceptance limits with your OEM or internal SOPs.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col \/><col \/><col \/><col \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Claim focus<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Primary method(s)<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Typical parameters to document<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Example acceptance (illustrative)<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Lightfastness (full &amp; 1:3 TiO2 tint)<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>ISO 105\u2011B02; ASTM D4303<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Xenon\u2011arc exposure; record \u0394E*ab and Blue Wool rating; note full vs tint<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Full shade \u22656\u20137 on 1\u20138 scale; tint \u0394E \u22641.5 at defined exposure; document method variant (<a class=\"link\" href=\"https:\/\/www.micomlab.com\/micom-testing\/astm-d4303\/\" target=\"_blank\" rel=\"nofollow noopener\">method overview<\/a>)<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Exterior weathering of coatings<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>ISO 4892\u20112 \/ ASTM G155 (xenon\u2011arc); ASTM G154 (QUV)<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Film type, resin, UV irradiance, cycle time; gloss at 60\u00b0; adhesion<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>After 500 h QUV (UVA\u2011340): gloss retention \u226585%; xenon 1,000 h: tint \u0394E \u22641.5 (program\u2011dependent) (<a class=\"link\" href=\"https:\/\/www.atlas-mts.com\/knowledge-center\/atlas-weathering-blog\/2022\/march\/weathering-testing-standards-for-automotive-applications\" target=\"_blank\" rel=\"nofollow noopener\">Atlas automotive weathering<\/a>)<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Heat stability in plastics (PP\/PA\/PC)<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Internal thermal hold aligned to polymer window; reference ASTM D3451 sections<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>240\/260\/280\u202f\u00b0C \u00d7 10\u202fmin holds on pellets\/plaques; track \u0394E and hue angle<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u0394E \u22641.0\u20131.5 and minimal hue shift at target processing temp; escalate if drift seen (<a class=\"link\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10543990\/\" target=\"_blank\" rel=\"nofollow noopener\">\u03b3\u2011phase rationale<\/a>)<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Solvent\/chemical resistance<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Vendor scale 1\u20135 with named media<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>MEK double rubs, xylene, ethanol; 5% HCl\/5% NaOH; time\/concentration<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>4\u20135 ratings in xylene\/ethanol; 3\u20134 in MEK; acids\/alkalis 5 where resin allows (<a class=\"link\" href=\"\/wp-content\/uploads\/1370_NAPHTHOL_RED_170_EN_TDS.pdf\" target=\"_blank\" rel=\"nofollow noopener\">representative TDS scale<\/a>)<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Migration\/set\u2011off (inks, screening)<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>EN 1186 (overall\/specific migration); EuPIA guidance<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Food simulant, time\/temp, surface area; GC\u2011MS\/LC\u2011MS analytics<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Meet OML\/SML per substrate\/regulation; escalate to accredited lab for compliance (<a class=\"link\" href=\"https:\/\/www.eupia.org\/wp-content\/uploads\/2023\/06\/2023-05-03-EuPIA-Guidance-on-Migration-Test-Methods.pdf\" target=\"_blank\" rel=\"nofollow noopener\">EuPIA test guidance<\/a>)<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Performance Expectations for Pigment Red 170 (What\u2019s Typical and How to Read It)<\/h2>\r\n\r\n\r\n\r\n<p>Publicly available summaries for Pigment Red 170 commonly report full\u2011shade lightfastness in the 6\u20137 range on the 1\u20138 scale, with tint performance lower and more grade\u2011dependent. These ranges reflect xenon\u2011arc\/Blue Wool\u2011type exposures rather than casual window tests; verify the exact protocol before comparing numbers across suppliers. A method summary for lightfastness and the meaning of ASTM\/ISO variants is provided in Micom\u2019s overview of colorfastness testing (<a class=\"link\" href=\"https:\/\/www.micomlab.com\/micom-testing\/astm-d4303\/\" target=\"_blank\" rel=\"nofollow noopener\">ASTM\/ISO lightfastness context<\/a>). For accelerated exterior durability of coatings, xenon\u2011arc per ISO 4892\u20112 or ASTM G155 and fluorescent UV\/condensation per ASTM G154 (QUV) are standard; Atlas\u2019 automotive weathering guidance explains how to set realistic irradiance and cycling (<a class=\"link\" href=\"https:\/\/www.atlas-mts.com\/knowledge-center\/atlas-weathering-blog\/2022\/march\/weathering-testing-standards-for-automotive-applications\" target=\"_blank\" rel=\"nofollow noopener\">designing automotive weathering programs<\/a>).<\/p>\r\n\r\n\r\n\r\n<p>Heat stability claims for PR170 in plastics are often quoted around 240\u2013260\u202f\u00b0C, with some high\u2011performance implementations holding color up to ~280\u202f\u00b0C under short\u2011duration conditions. Numbers vary because test set\u2011ups vary (hold time, substrate, antioxidant package). When evaluating for PA\/PC\/PP, insist on \u0394E*ab and hue\u2011angle reporting at clearly stated temperatures and times, not just a single \u201cmax \u00b0C.\u201d Peer\u2011reviewed crystallography work on PR170\u2019s denser polymorphs (e.g., \u03b3\u2011phase) supports improved thermal behavior under melt (<a class=\"link\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10543990\/\" target=\"_blank\" rel=\"nofollow noopener\">\u03b3\u2011phase conversion improves processing behavior<\/a>).<\/p>\r\n\r\n\r\n\r\n<p>On solvent\/chemical resistance, expect 1\u20135 scales with MEK\/xylene\/ethanol\/acid\/alkali specifically named and exposure times listed. Representative TDS tables for a PR170 show ratings like MEK 3\u20134, xylene 4\u20135, ethanol 4\u20135, acids\/alkalis 5; always interpret these in the context of your resin and cure (<a class=\"link\" href=\"https:\/\/www.pigments.com\/wp-content\/uploads\/1370_NAPHTHOL_RED_170_EN_TDS.pdf\" target=\"_blank\" rel=\"nofollow noopener\">example resistance table reference<\/a>). For packaging\u2011adjacent inks, use EN 1186 overall migration with EuPIA\u2019s testing roadmap to screen before engaging accredited compliance programs (<a class=\"link\" href=\"https:\/\/www.eupia.org\/wp-content\/uploads\/2023\/06\/2023-05-03-EuPIA-Guidance-on-Migration-Test-Methods.pdf\" target=\"_blank\" rel=\"nofollow noopener\">EuPIA migration testing framework<\/a>).<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Exterior Coatings Hero: Automotive &amp; Industrial Tint Stability That Holds Up<\/h2>\r\n\r\n\r\n\r\n<p>Exterior topcoats live or die by tint stability. A practical workflow to qualify PR170 HP RED 2130 in an acrylic or polyester\u2011melamine system looks like this: disperse to a defined Hegman fineness, draw down full shade and 1:3 TiO2 tint, and cure per resin TDS. Run parallel weathering: (1) QUV UVA\u2011340 per ASTM G154 with 8\u202fh UV\/4\u202fh condensation cycles to 500\u202fh; (2) xenon\u2011arc per ISO 4892\u20112 or ASTM G155 to 1,000\u202fh on a right\u2011light filter set. Track gloss at 60\u00b0 and \u0394E*ab, and specify a tint \u0394E target such as \u22641.5 at 1,000\u202fh (your OEM may set 1.0\u20131.2). Adhesion (ASTM D3359, aim for 5B) and MEK rub resistance are logged as secondary checks. Atlas\u2019 automotive weathering notes provide parameter selection guidance to ensure tests are meaningful rather than punitive (<a class=\"link\" href=\"https:\/\/www.atlas-mts.com\/knowledge-center\/atlas-weathering-blog\/2022\/march\/weathering-testing-standards-for-automotive-applications\" target=\"_blank\" rel=\"nofollow noopener\">automotive weathering parameter selection<\/a>).<\/p>\r\n\r\n\r\n\r\n<p>Where Pigment Red 170 earns its place is the combination of robust full\u2011shade durability and manageable tint performance, especially in the opaque forms designed for coatings. If your tint is the limiter, adjust pigment volume concentration (PVC), dispersant package, and TiO2 type\/level\u2014then re\u2011run xenon and QUV. Many labs also monitor hue\u2011angle drift because small \u0394h, even at low \u0394E, can be visually unacceptable for automotive matches.<\/p>\r\n\r\n\r\n\r\n<p>For deeper due diligence without violating vendor naming policies, you can set up an anonymized side\u2011by\u2011side: PR170 HP RED 2130 versus a generic \u201cstandard PR170\u2011type reference\u201d at equal loading and grind, then compare \u0394E and gloss retention under identical programs. Keep the report numerical and method\u2011anchored.<\/p>\r\n\r\n\r\n\r\n<p>For additional reading on pigments selected for coatings applications, see the coatings category overview on Honor Pigments\u2019 site, which outlines application contexts and quality system credentials (<a class=\"link\" href=\"\/sq\/kategori-produkti\/pigmentet-organike\/pigmentet-per-veshje-bojaxhi\/\" target=\"_self\" rel=\"follow\">pigments for coatings and paints<\/a>).<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Powder &amp; Coil Coatings Hero: Weathering and Mechanical Balance<\/h2>\r\n\r\n\r\n\r\n<p>Powder and coil coatings impose two filters before outdoor exposure even begins: cure temperature\/time and post\u2011cure mechanicals. Typical polyester powder windows are 180\u2013200\u202f\u00b0C for 10\u201320\u202fmin; coil lines often use stoving cycles of similar magnitude. Start with a bake\u2011screen panel set at your line\u2019s low, nominal, and high cure profiles. Record color drift and gloss, then run solvent resistance (MEK double rubs) and adhesion (ASTM D3359). Next, take the nominal cure set into QUV and xenon\u2011arc programs. A balanced outcome looks like: minimal \u0394E on bake\u2011sensitivity, passing solvent rubs, 5B adhesion, \u226585% gloss retention at 500\u202fh QUV, and controlled tint \u0394E under xenon.<\/p>\r\n\r\n\r\n\r\n<p>The choice between more opaque vs more transparent PR170 forms affects hiding versus clean undertone in powders; for exterior durability, denser\/opaque forms are usually favored. If your finish targets a metallic or thin\u2011film coil build where transparency helps with flop and sparkle, run an extended xenon program because tint lightfastness will be your governor.<\/p>\r\n\r\n\r\n\r\n<p>If you need a quick sense of fit for this application family, Honor Pigments maintains application category pages, including powder and coil sub\u2011pages, that outline typical resin\/pigment pairings and processing contexts (<a class=\"link\" href=\"\/sq\/kategori-produkti\/pigmentet-organike\/pigmentet-per-veshje-bojaxhi\/pigmentet-per-veshjet-me-pluhur\/\" target=\"_self\">pigmentet p\u00ebr veshjet me pluhur<\/a> and <a class=\"link\" href=\"\/sq\/kategori-produkti\/pigmentet-organike\/pigmentet-per-veshje-bojaxhi\/pigments-for-coil-coatings\/\" target=\"_self\">pigments for coil coatings<\/a>).<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Engineering Plastics Notes: Heat\u2011Hold and Color Drift in PA\/PC\/PP<\/h2>\r\n\r\n\r\n\r\n<p>In polymers, you\u2019re validating whether Pigment Red 170 can tolerate your melt history. A practical lab screen for PR170 HP RED 2130 uses stepwise thermal holds on compounded plaques or pigmented pellets: 240\/260\/280\u202f\u00b0C \u00d7 10\u202fmin (match to PP\/PA\/PC ranges), then measure \u0394E*ab and hue angle against an unexposed control. Flag any hue rotation that would fail a visual panel. If drift is observed at the top temperature, try a lower\u2011temperature, longer hold matching your real residence time; pigment\u2011resin\u2011stabilizer interactions matter.<\/p>\r\n\r\n\r\n\r\n<p>The microstructure story from crystallography\u2014denser polymorphs such as \u03b3\u2011phase showing improved thermal behavior\u2014lines up with what processors see: certain PR170 implementations give better color hold when the crystal form and particle distribution are tuned. For a quick context on how crystalline modifications influence processing properties, see the open\u2011access \u03b3\u2011phase conversion study linking hydrothermal treatment to improved flowability and stability (<a class=\"link\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10543990\/\" target=\"_blank\" rel=\"nofollow noopener\">\u03b3\u2011phase conversion study<\/a>).<\/p>\r\n\r\n\r\n\r\n<p>If your business also runs masterbatch or concentrates, the dispersion pathway (two\u2011stage vs direct\u2011let\u2011down), screw design, and stabilizer package can affect the perceived heat stability as much as the pigment itself. Validate on your exact line.<\/p>\r\n\r\n\r\n\r\n<p>For reference on application families and available pigment classes in plastics, see the plastics &amp; masterbatch category page on Honor Pigments\u2019 site (<a class=\"link\" href=\"https:\/\/www.honorpigment.com\/sq\/kategori-produkti\/pigmentet-organike\/pigments-for-plasticsampmasterbatch\/\" target=\"_self\">pigments for plastics and masterbatch<\/a>).<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Solvent Resistance and Low\u2011Migration Context for Inks<\/h2>\r\n\r\n\r\n\r\n<p>In ink systems, PR170\u2019s solvent and chemical resistance are typically summarized on a 1\u20135 scale per named medium (MEK, xylene, ethanol, weak acid\/base). Read these ratings alongside your vehicle, cure, and substrate\u2014flexo nitrocellulose behaves differently than UV acrylate. For packaging\u2011adjacent scenarios, treat low migration as a system property, not a pigment property alone. Screen with EN 1186 overall\/specific migration protocols and follow the industry roadmap from the European printing inks association for test selection, simulants, and escalation (<a class=\"link\" href=\"https:\/\/www.eupia.org\/wp-content\/uploads\/2023\/06\/2023-05-03-EuPIA-Guidance-on-Migration-Test-Methods.pdf\" target=\"_blank\" rel=\"nofollow noopener\">EuPIA migration testing guidance<\/a>). If early screening is promising, commission accredited lab work per your customer\u2019s regulatory framework.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">A Practical Micro\u2011Example (Disclosure Included)<\/h2>\r\n\r\n\r\n\r\n<p>Disclosure: Honor Pigments is our product.<\/p>\r\n\r\n\r\n\r\n<p>Two quick lab workflows show how PR170 HP RED 2130 can be screened for the hero scenarios without over\u2011promising:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Automotive\/industrial topcoat tint: Mill to target fineness; prepare full shade and 1:3 TiO2 tint panels in an acrylic\u2011melamine. Run QUV UVA\u2011340 to 500\u202fh (gloss target \u226585%) and xenon\u2011arc (ISO 4892\u20112) to 1,000\u202fh with tint \u0394E \u22641.5 as the provisional pass. If the tint struggles, adjust PVC\/dispersion and re\u2011test rather than increasing pigment load indiscriminately.<\/p>\r\n<\/li>\r\n<li>\r\n<p>PP compounding heat\u2011hold: Compound a 1% masterbatch, let down to 0.2\u20130.3% in PP; press plaques, then hold at 240\/260\/280\u202f\u00b0C \u00d7 10\u202fmin. Accept if \u0394E \u22641.5 and hue rotation is negligible at your line\u2019s true temperature. If marginal at 280\u202f\u00b0C, verify whether actual residence time\/temperature justifies that hold or if stabilizers need adjustment.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>For background on the company\u2019s quality system and application focus (ISO 9001; coatings, plastics, inks), see the Honor Pigments home page (<a class=\"link\" href=\"\/sq\/\" target=\"_self\">Honor Pigments, ISO 9001 profile<\/a>).<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Troubleshooting Quick Answers<\/h2>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>My tint fails xenon\u2011arc before the masstone: This is common with organic reds. Re\u2011balance TiO2 type\/level, lower PVC, and verify dispersant selection; re\u2011run xenon before changing pigment chemistry.<\/p>\r\n<\/li>\r\n<li>\r\n<p>I see a small but visible hue shift in PP at 260\u202f\u00b0C: Confirm residence time. If line reality is closer to 240\u2013250\u202f\u00b0C, reset the hold profile; if not, evaluate stabilizer synergy or a denser\u2011polymorph implementation of PR170.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Solvent rubs fail after QUV: Check under\u2011cure or over\u2011exposure. Validate your cure window first; pigment fastness readings are unreliable if the film isn\u2019t fully developed.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Next Steps<\/h2>\r\n\r\n\r\n\r\n<p>If you need a data sheet, a method sheet aligned to your lab, or a small batch for trials, request a technical packet; we\u2019ll align test parameters to your resin and processing window and share anonymized, method\u2011anchored benchmarks on request.<\/p>\r\n\r\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Comprehensive ultimate guide to Pigment Red 170 (PR170 HP RED 2130): testing protocols, heat &#038; weathering performance, dispersion and formulation tips for coatings, plastics, and inks. Request data.<\/p>","protected":false},"author":2,"featured_media":8384,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/posts\/8377","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/comments?post=8377"}],"version-history":[{"count":0,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/posts\/8377\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/media\/8384"}],"wp:attachment":[{"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/media?parent=8377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/categories?post=8377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.honorpigment.com\/sq\/wp-json\/wp\/v2\/tags?post=8377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}