Monoazo Lake (Ca) Lithol Rubine Series Process Magenta

Pigment Red 57:1

Lithol Rubine BCA — Process Magenta & Bluish Red

The standard process magenta for CMYK printing worldwide. A calcium lake monoazo delivering brilliant, clean bluish-red shades with outstanding transparency and tinting strength — essential for offset, gravure, and flexographic inks.

pigment photo
CI Name
Pigment Red 57:1
CI Number
CI 15850:1
Chemical Class
Monoazo Lake (Ca)
Shade
Bluish Red (Magenta)
Heat Stability
Up to 180 °C
Product overview

Specifications

Why PR 57:1 is the definitive process magenta

PR 57:1 is specified globally as the process magenta (M) in CMYK printing — its calcium lake structure delivers superior transparency and clean bluish-red tone versus barium lake alternatives, letting cyan and yellow show through cleanly in overprints. Excellent flow and colour strength make it the standard choice for offset, gravure, and flexo packaging inks. Not recommended for prolonged exterior UV exposure — specify for print and indoor decorative use.

Chemical class
Monoazo Lake (Calcium)
Colour Index name
Pigment Red 57:1
Colour Index number
CI 15850:1
CAS number
5281-04-9
Shade tone
Bluish red (process magenta)
Specific gravity
~1.5 g/cm³
pH (10% slurry)
6.5 – 8.0
Available forms
Powder
Heat stability
Stable up to 180 °C
Best use
Offset, flexo & gravure inks (process magenta), decorative paints
Technical performance

Performance Properties

PropertyStandard / NoteRating
LightfastnessISO 105-B02
Good (3/5)
Transparency
Excellent (5/5)
Colour strengthTinting method
Excellent (5/5)
Flow propertiesInk viscosity
Excellent (5/5)
DispersionOffset / flexo / gravure
Excellent (5/5)
End-use markets

Applications

Offset Inks (Process Magenta)

The globally specified process magenta for CMYK offset printing. Delivers the clean, transparent bluish-red essential for accurate colour reproduction.

Flexo & Gravure Inks

Outstanding transparency and tinting strength make PR 57:1 the standard magenta for flexographic and gravure packaging print.

Water-based Inks & Decorative Paints

Good dispersion and clean bluish-red masstone for water-based inks and indoor decorative paint applications.

Soft PVC

Suitable for soft PVC compounding at moderate processing temperatures where a bright magenta-red shade is required.

Product forms

Available Forms

Dry Powder
Presscake
Custom Grade

Presscake form delivers superior transparency for high-quality offset and gravure process magenta. Contact us to specify concentration and vehicle compatibility for your ink system.

Compliance

Regulatory Status

REACH Registered

Registered under EU REACH regulation. Full SDS available on request for compliance documentation.

Heavy Metal Free (RoHS Metals)

Contains no lead, cadmium, mercury, or chromium VI. The calcium lake structure is outside the RoHS-restricted metals list.