FULL SHADEP.R.57:1
TINT
Digital color reference · physical approval required
ORGANIC PIGMENTS
Pigment Red 57:1
Pigment Red 57:1 is a calcium-lake monoazo pigment widely known as Lithol Rubine. Ink grades are used for process-magenta shades in offset and other printing systems, while selected grades are used in plastics. Shade, rheology and resistance vary with grade and vehicle.
- Color Index / grade
- P.R.57:1
- CAS
- 5281-04-9
- Chemical family
- Monoazo calcium-lake pigment
- Published heat resistance
- 240 °C
- Light fastness
- 5–6 / 8
Typical application scopePlastics & masterbatch · Printing inks · Coatings & paint
PRODUCT PROFILE
P.R.57:1Pigment Red 57:1 — grade profile
Pigment Red 57:1 (P.R.57:1) is a monoazo calcium-lake pigment for Plastics & masterbatch, Printing inks and Coatings & paint. Compare shade, tinting strength, dispersion and processing stability in the customer’s actual resin or binder rather than relying on one universal value.
Published screening data includes published heat reference 240 °C, light fastness 5–6/8 and oil absorption 45–55 ml/100g. Application-specific heat and fastness entries in the technical table take precedence.
Primary listed fits include PVC, Polyolefins (PO), PP fiber, Offset inks, Water-based inks and PA inks; PP inks, Toluene-based inks and Industrial coatings are listed for evaluation.
Selection focus
At equal loading, compare shade, tinting strength, dispersion and resin or binder compatibility, then confirm the required fastness under the final process conditions.
REFERENCE SHADE
Full shade and tint
Rubine / magenta; grade dependent
Full shade
Tint / reduction
Manufacturer-published shade descriptions were used to correct the color direction. Screen colors remain visual references, not batch standards; approve a physical drawdown or molded plaque under agreed test conditions.
TECHNICAL DATA
Published specifications
Only identified or numerical fields supported by public registry and product-table data are shown. Unpublished values are omitted.
ParameterPublished value
Product namePigment Red 57:1
Color Index / product gradeP.R.57:1
Colorant categoryOrganic pigments
CAS number5281-04-9
C.I. constitution number15850:1
Molecular formulaC18H12CaN2O6S
Chemical familyMonoazo calcium-lake pigment
Physical appearanceColored powder
Heat resistance · plastics240 °C
Heat resistance · coatings180 °C
Heat resistance · printing inks180 °C
Light fastness5–6 / 8
Acid resistance4 / 5
Alkali resistance4 / 5
Oil absorption45–55 ml/100g
Performance values are catalogue references. The current grade TDS, test conditions and agreed batch COA govern product approval.
APPLICATION CHART
Recommended systems at a glance
Application areaRecommendedEvaluate
Plastics & masterbatch
PVCPolyolefins (PO)PP fiber
—
Printing inks
Offset inksWater-based inksPA inksNC inksUV inks
PP inksToluene-based inks
Coatings & paint
Powder coatings
Industrial coatings
Application listings support initial selection and still require validation in the customer's resin, binder, process and end-use conditions.