Color Swatch created using Full strength/50/50 and was applied on Cold Press Bristol Board (2-ply) material.
This color contains the following pigments:
PR170—Naphthol Red
Pigment Type
monoazo
Chemical Name
n/a
Chemical Formula
C26H22N4O4
Properties
This Naphthol Red is a bright deep red with bluish undertones. It has an average drying time.
Permanence
This Naphthol Red has fair to good lightfastness, not because of its masstone, but because it fades in tints. Not suitable for exterior use.
Toxicity
Naphthol Reds are not considered toxic.
History
Naphthol pigments are actually dyes that are "laked" to form pigments. First developed by the German chemical company Hoechst A.G. before World War I, their use in artist paints began in the 1920s.
Alternate Names
Naphthal, Naphthol Bordeaux, Naphthol Carbamide, Naphthol Carmine, Permanent Carmine, Permanent Red.
PR12—Permanent Bordeaux
Pigment Type
organic, monoazo
Chemical Name
n/a
Chemical Formula
n/a
Properties
Permanent Bordeaux has excellent tinting strength.
Permanence
Permanent Bordeaux is reported to have good lightfastness.
Toxicity
n/a
History
Permanent Bordeaux (PR12) was discovered by H. Wagner in 1921. It has been used in many printing inks, plastics colorants, textile paints, and industrial paints. It is widely manufactured.
Alternate Names
Aquarine Bordeaux, Irgalite Bordeaux, Solintor Rubine
