Pigment Red 57:1 (Rubine Red, Naphthol Red 2B)
CAS Number: 5281-04-9
Pigment Red 57:1 (PR 57:1, Rubine or Lithol Rubine) is the most widely used magenta/red pigment in offset lithographic and gravure printing inks, especially for process magenta in CMYK. A barium salt laked azo pigment, PR 57:1 delivers brilliant magenta hue, very high transparency, and outstanding gloss in oil-based offset inks, making it the standard for magazine and catalog printing as well as decorative packaging.
Technical Specifications
| appearance | Brilliant red to magenta fine powder |
| moisture (%) | ≤1.5 |
| heat stability (°C) | 150–170 |
| particle size (d50, µm) | 0.1–0.4 |
| lightfastness (blue-wool) | 4–5 |
Applications
- Process magenta in CMYK offset lithographic inks
- Gravure magenta for magazine and catalog printing
- Flexo red and magenta inks for packaging
- Decorative offset ink for carton and label printing
- Publication screen-printing magenta inks
Key Features
- Brilliant magenta hue as standard process CMYK color
- Extremely high transparency for excellent overprint gamut
- Outstanding gloss in offset lithographic ink vehicles
- Consistent hue angle for reliable color management in printing
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