FULL SHADEP.R.4
TINT
Digital color reference · physical approval required
ORGANIC PIGMENTS
Pigment Red 4
Pigment Red 4 is a beta-naphthol monoazo pigment with a yellowish scarlet shade. It is used in offset inks, water-based inks and aqueous coatings, with selected grades also considered for solvent inks and textile printing.
- Color Index / grade
- P.R.4
- CAS
- 2814-77-9
- Chemical family
- Monoazo pigment
- Published heat resistance
- 150 °C
- Light fastness
- 6 / 8
Typical application scopePrinting inks
PRODUCT PROFILE
P.R.4Pigment Red 4 — grade profile
Pigment Red 4 (P.R.4) is a monoazo pigment for Printing inks. 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 150 °C, light fastness 6/8 and oil absorption 35–45 ml/100g. Application-specific heat and fastness entries in the technical table take precedence.
Primary listed fits include Water-based inks.
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
Yellowish scarlet red
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 Unpublished values are omitted.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 4
Color Index / product gradeP.R.4
Colorant categoryOrganic pigments
CAS number2814-77-9
C.I. constitution number12085
Molecular formulaC16H10ClN3O3
Chemical familyMonoazo pigment
Physical appearanceColored powder
Light fastness6 / 8
Acid resistance4 / 5
Alkali resistance5 / 5
Oil absorption35–45 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
Printing inks
Water-based inks
—
Application listings support initial selection and still require validation in the customer's resin, binder, process and end-use conditions.