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Description

Color Swatch

Pigment Info

00476-3500 — Azo Red Deep

Van Gogh Oil Colors have been developed for artists who are searching for quality and exceptional value. These paints are particularly easy to mix and work with because all colors in the range have virtually the same degree of gloss and viscosity.

Azo Red Deep

This color contains the following pigments:

PO34—Diarylide Orange
PR57:1—Lithol Rubine

PO34—Diarylide Orange

Pigment Type

organic, disazo

Chemical Name

n/a

Chemical Formula

n/a

Properties

Diarylide Orange is a bright, reddish orange.

Permanence

n/a

Toxicity

n/a

History

Diarylide Orange has been widely used in printing inks, plastics, emulsions, coatings, and textile printing.

Alternate Names

Diacetanil Orange, Acosil Orange, Helio Orange, Sunbrite Orange

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PR57:1—Lithol Rubine

Pigment Type

organic, monoazo

Chemical Name

n/a

Chemical Formula

C₁₈H₁₂N₂O₆, calcium salt

Properties

Lithol Rubine (PR57:1) is a deep transparent red dye, generally slightly bluish, that is laked as a salt with sodium or calcium to form a pigment. PR57 is the sodium salt, and has a more bluish tone. PR57:1 is the calcium salt, and is the most widely used. Lithol Rubine makes clean pinks when tinted. Sources vary greatly in hue and transparency. Lithol Rubine has high tinting strength.

Permanence

Lightfastness is considered only fair to good. Superior products are available when lightfastness is paramount. Where greater lightfastness is needed in process color printing, the more expensive pigment PR184, a Naphthol AS pigment, is often substituted for Lithol Rubine.

Toxicity

Lithol Rubine is not considered toxic. It is used in food, drugs, and cosmetics. Pink lipstick is often manufactured with pigment PR57:1. Lithol Rubine can be used in art materials intended for children.

History

Lithol Rubine pigments (especially the calcium salt PR57:1) are widely used in inks, paints, plastics, and textiles. Lithol Rubine is widely used as magenta in process color printing.