Pigment Red 185

Pigment Red 185 is a bluish red pigment. It is almost not soluble in any solvent, and it is sterilization resistance. In printing ink, PR185 has a heat resistance of 220℃/10min. It is suitable for metal decorative ink and laminated plastic film ink. Its light fastness in these two application can be grade 6-7.  And it is also suitable for the coloring of soft PVC and the migration resistance is very good in soft PVC.

Product Details


Pigment Red 185 is a very transparent red pigment. It has excellent fastness to different kinds of solvent as well as good water fastness. It also performs well in alkali condition. Its resistance in paraffin and toluene is also good.

Chemical information

Color Index No:C.I.12516


Molecular Structure:

Pigment Red 185 molecular

Molecular Formula:C27H24N6O6S Molecular Weight:560.581
CAS No:51920-12-8 Average Particle Size(um):0.18
Density(g/cm3):1.523 EINECS No:257-515-0
Oil Absorption(g/100g):97 Specific surface(m2/g):45
Chemical Class:Benzimidazolone Melting point(/℃):335

Chemical resistance datas

Light fastness (Full) : 6 Light fastness(Tinting) : 5-6
Ethyl acetate:  5 Ethanol : 4-5
Heat stability (10min) :200 DOP:5
Acid: 4-5 Alkali : 5
Migration:5 Weather:4



Sheetfed offset ink: ◭ Water-based ink: ◭
Heat set ink: ◭ NC ink: ◭
Cold set ink: – Metal decorative ink: ▲
Gravure ink: – UV curing ink(offset): ▲
Silkscreen ink: ◭ UV curing ink(Flexo): ▲
Coating Water based industrial paint: △ Powder Coatings: ◭
Solvent based industrial paint: △ Automotive coatings: –
Water based decorative paint : △ Wood coatings: –
Solvent based decorative paint: △ Amine curing epoxy coatings: –
Coil Coating: – Textile printing: –
Plastic PE: ▲ PA: –
PP: – ◭ PC: –
PVC: ▲ Pom: –
ABS: – Rubber: ▲
PUR: – ◭ Fibers: –

Packing methods

25kgs craft bag with pallets; 7-8MT in 20’FCL