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PR149—Perylene Red

Pigment Type

organic

Chemical Name

n/a

Chemical Formula

C₄₀H₂₆N₂O₆

Properties

Perylene Red is a moderately intense, semi-opaque, medium red pigment, appearing somewhere between a Cadmium Red and a Cadmium Deep Red hue. It has excellent brightness and tinting strength.

Permanence

Perylene Red has good lightfastness and permanence. Its tints may darken after extended exposure to sunlight. It is not considered suitable for exterior use.

Toxicity

Perylene Red has no significant acute toxicity. Its long term hazards are currently unknown.

History

Perylenes have been used as vat dyes since 1912, but they were not manufactured and sold as pigments until 1957.

Alternate Names

Perylene Scarlet

PR166—Cromophtal Scarlet

Pigment Type

organic, disazo

Chemical Name

n/a

Chemical Formula

n/a

Properties

Pigment Red 166 has a yellowish red tone. It is semi-transparent and has high tinting strength.

Permanence

Pigment Red 166 has very good lightfastness.

Toxicity

n/a

History

Pigment Red 166 is a disazo condensation pigment, and is used in paints, plastics, printing inks, packaging, textiles, and many other applications.

Alternate Names

Microlith Scarlet

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.