Pigment Yellow
颜料黄 55（星辉黄 55）
颜料黄 55（CAS 6842-68-8，C.I. 21160）是一种双偶氮有机颜料，呈中等黄色色调，在印刷油墨配方中具有优异的透明度和高光泽度。PY55 展现出卓越的流动性、出色的色纯度和可靠的耐光性（评级 4–5），是高质量出版凹版和柔性版印刷的首选。其细粒径确保了油墨转移顺畅及网点还原清晰。广泛应用于溶剂型和水性油墨体系、装饰涂料以及注重透明度与亮度的特定塑料着色应用。
Key Information
技术规格
产品概览
Starwin Yellow 55 (Pigment Yellow 55, C.I. 21160, CAS 6842-68-8) is a high-clarity disazo pigment that stands out for its exceptional transparency and brilliant medium-yellow hue. Unlike the more opaque PY12 and PY13, PY55 is engineered for applications where light transmission through the pigment layer is desirable — such as process-color gravure printing and transparent coating effects.
由杭州星文科技有限公司采用先进表面处理技术生产，该颜料在着色力与流动特性之间实现最佳平衡，支持高速印刷并最大限度减少停机时间。
密钥标识
| Property | 价值 |
|---|---|
| C.I. Generic Name | 颜料黄 55 |
| 客户编号 | 21160 |
| CAS Registry No. | 6842-68-8 |
| 化学类别 | 双偶氮 |
| Visual Appearance | Bright medium-yellow powder |
| Molecular Formula | C₃₀H₂₄Cl₂N₆O₆ |
Technical Specifications
| Parameter | Typical Value |
|---|---|
| 耐光性（全遮光） | 4–5（蓝色羊毛色卡） |
| Heat Resistance | Up to 160 °C |
| 吸油 | 45–55 克/100 克 |
| 堆积密度 | 0.28–0.42 g/cm³ |
| Particle Size (D50) | 0.10–0.18 微米 |
| pH of Aqueous Suspension | 5.0–7.0 |
| 水溶性 | ≤ 0.4 % |
How to Interpret These Specifications
The fine particle size (D50: 0.10–0.18 μm) is the key to PY55's transparency — smaller particles scatter less light, allowing the substrate or underlying ink layers to show through. This makes PY55 ideal for four-color process printing where color mixing depends on optical transparency rather than pigment opacity. The higher oil absorption (45–55 g/100g)反映了细颗粒更大的比表面积，应在油墨流变调整中予以考虑。
关键应用领域
- Publication Gravure Inks:卓越的透明度确保在高速轮转印刷机上实现精准的四色套印。
- Flexographic Inks: Fine particle size ensures clean anilox roll release and consistent color density at high line screens.
- Transparent Overprint Varnishes: Adds warm yellow tint to clear coatings without sacrificing gloss or clarity.
- Decorative Wood Coatings:透明度让木纹清晰可见，同时赋予温暖的金色调。
- 文具与特色墨水： Clean shade and good flow produce uniform color on bond paper and lightweight substrates.
重要提示
- PY55 不推荐用于需要高遮盖力的应用——请使用 PY12 或 PY13 以获得完全遮盖效果。
- Heat resistance is limited to 160 °C; avoid use in engineering plastic processes exceeding this threshold.
- For outdoor applications exceeding 12 months, consider overcoating with a UV-stable clear topcoat to extend color life.
Packaging & Storage
Supplied in 25 kg paper/PE composite bags or 500 kg jumbo bags. Store in original packaging in a dry, ventilated warehouse at 5–35 °C. Protect from moisture and direct sunlight. Shelf life: 36 months from manufacture date when stored properly.
FAQ
What makes PY55 more transparent than PY12?
PY55 has a significantly smaller average particle size (0.10–0.18 μm vs. 0.15–0.25 μm for PY12). Smaller particles scatter less visible light, resulting in higher transparency and lower hiding power.
Can PY55 be used in UV-cured inks?
Yes, PY55 is compatible with UV-cured ink formulations. Its fine particle size disperses well in acrylate monomers and oligomers. However, verify lightfastness under the specific UV lamp spectrum used in your process.
What is the recommended pigment concentration in gravure inks?
Typical loading is 5–12 % by weight in the finished ink, depending on the anilox volume and desired color density.
为何选择我们
杭州星威科技有限公司生产PY55，具备精密粒径控制，确保批次间透明度和色相一致性（ΔE ≤ 0.5）。我们提供全面的技术支持、免费打样及针对您特定油墨或涂料体系的定制化分散等级。
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