Pigment Blue 15:3 (Phthalocyanine Blue, Beta-form)
CAS Number: 147-14-8
Beta-crystalline copper phthalocyanine (PB 15:3) is the universal process cyan pigment for CMYK printing across offset, flexo, gravure, screen, and digital inks, delivering outstanding lightfastness (8 on blue-wool scale), excellent transparency for process color work, and broad chemical resistance. Its stable beta-crystal form resists phase transition to the alpha form during milling and ink manufacture, ensuring consistent color and rheology in the finished ink.
Technical Specifications
| appearance | Bright blue powder |
| crystal form | Beta (stable) |
| moisture (%) | ≤1.0 |
| particle size (d50, nm) | 50–200 (grade dependent) |
| lightfastness (blue-wool) | 8 |
Applications
- Process cyan in CMYK offset lithographic inks
- Flexo process cyan ink for flexible packaging
- Gravure cyan ink for publication and packaging
- UV offset and flexo CMYK cyan formulations
- Digital inkjet cyan ink base pigment
Key Features
- Stable beta-crystalline form resists phase change during ink manufacture
- Outstanding transparency for high-quality process color overprints
- Excellent lightfastness for outdoor and durable label applications
- Available in easy-dispersing and nano grades for demanding applications
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