Pigment Selection for Printing Inks: Every Formulator’s FAQ Pigments are the most expensive component in printing ink — typically 15-30% of total formulation cost — and they determine everything downstream: color, printability, durability, and regulatory compliance. Yet pigment selection is often treated as a procurement decision rather than a technical one. This FAQ addresses the … Read more
TL;DR: Both are copper phthalocyanine blue. Same molecule, different crystal. PB15:1 is alpha — reddish shade, lower crystallinity, easier to disperse. PB15:3 is beta — greenish shade, high crystallinity, won’t flip phase at 200°C. Use PB15:1 in solvent inks and liquid coatings. Use PB15:3 in powder coatings and engineering plastics. Pick wrong, and you get … Read more
TL;DR — Blue Wool Scale（BWS）7 级和 8 级之间不是差”一格”，是对数差距。BWS 7 的颜料在氟罗里达外墙涂料里撑不过 5 年，而汽车 OEM 涂料直接不接 BWS 7。更要命的是：厂商给你的耐光数据，99% 是用全色（full shade）测的。你实际用的配方如果是冲淡色（reduction），耐光可能直接掉 3-4 级。一份靠谱的耐光数据，必须写清楚三件事：测试浓度、暴露标准、评级方法。缺任何一个，别信。 7 级和 8 级，不是差一个数字那么简单 先说一个大部分人不知道的事：Blue Wool Scale 是对数尺度。 每一个等级之间，耐光能量大致翻倍。BWS 1 在 Xenon arc 下几小时就变，BWS 8 要几百甚至上千小时。具体到我们行业最常碰到的两个等级： BWS 7：Xenon arc（ISO 105-B02）约 200-300 小时不出明显变色 BWS 8：Xenon arc 约 400-800 小时，好的能上千 换句话说，从 7 到 8，不是加了 14%，是耐光能力至少翻了一倍。 这个差距在真实环境里意味着什么？ 建筑外墙涂料（氟罗里达 … Read more
TL;DR 100 grams is not a qualification sample. It’s a first-look drawdown. If you’re running dispersion, viscosity, colorimetry, and QUV aging, you need 200-300 g minimum, and that assumes nothing fails. Run tests in the right order—dispersion first, then hue, then viscosity, then aging—so you stop on the first failure and don’t burn material you … Read more
TL;DR — If PR57:1 red ink looks fine on the printed web but bleeds into the LDPE layer during extrusion lamination at 320°C, the culprit isn’t solvent retention. It’s thermal dissolution-diffusion. Lithol rubine has a melting point around 360°C — close enough to 320°C that pigment molecules start dissolving into molten polyethylene at the nip. … Read more
TL;DR — NC-based gravure inks that thicken or gel above 35°C aren’t just “heat sensitive.” The real culprit is acid-catalyzed nitrocellulose degradation, kicked off by residual acidic groups on the pigment surface — especially barium and calcium salt lakes like PR48:2. Measure the pigment’s acid value. If it’s above 5 mg KOH/g, you’re sitting on … Read more
Introduction: PY83 and PY12 Are Both Diarylide Yellow Pigments Pigment Yellow 83 (PY83) and Pigment Yellow 12 (PY12) are two widely used Diarylide Yellow organic pigments. Both pigments are known for their bright yellow shades, good color strength, and cost-effectiveness, making them popular choices in printing inks, plastics, and other industrial applications. However, despite belonging … Read more
Pigment Blue 28 (CI 77346, CAS 1345-16-0) maintains ΔE ≤ 0.3 after 500 hours of QUV accelerated weathering and shows no color shift after 24 hours at 1300°C. This cobalt aluminate blue spinel (CoAl₂O₄) is engineered for applications requiring extreme thermal and chemical stability. HONOR Pigment’s PB28 grade delivers consistent hue (L*=40.2, a*=-12.8, b*=-38.5 … Read more
Pigment Yellow 42 — Iron Oxide Yellow (FeOOH) for Construction & Coatings Discover the trusted colorant for durable, UV‑resistant, and eco‑friendly applications. Pigment Yellow 42 (Iron Oxide Yellow, α‑FeOOH) is a synthetic inorganic pigment widely used in construction materials, industrial coatings, and architectural finishes. With excellent weatherfastness and chemical resistance, it delivers consistent yellow shades … Read more
DPP vs Quinacridone Pigments: Performance, Cost, and Application Guide Engineer-grade comparison for high-performance organic pigments: chemical stability, color strength, and total cost of ownership. Contents 1. Chemistry & Molecular Structure 2. Performance Comparison Table 3. Application Matrix by Industry 4. Total Cost Analysis 5. FAQ (3 Questions) Request Free Trial Pack 1. Chemistry & Molecular … Read more