Schmincke Soft Pastel - Scarlet 041D

Pigment Information

This color contains the following pigments:

PR3-Toluidine Red

PR168-Indanthren Brilliant Orange

PR254-Pyrrole Red

Pigment Name

PR3-Toluidine Red

Pigment Type

organic, monoazo

Chemical Formula

Properties

Toluidine Red is a semi-opaque, yellowish red pigment with high tinting strength.

Permanence

Toluidine Red has very good lightfastness.

Toxicity

Toluidine Red is not regarded as toxic.

History

Toluidine Red or Toluidine Scarlet has been used in inks, textiles, artist materials, and plastics.

Pigment Name

PR168-Indanthren Brilliant Orange

Pigment Type

organic, anthraquinone

Chemical Formula

Properties

Indanthren Brilliant Orange is insoluble in water.

Permanence

The lightfastness of anthraquinone vat dyes is consdered to be good, and may be improved upon by the use of protective coatings to avoid exposure of the dye to oxygen.

Toxicity

No information is available.

History

Indanthren Brilliant Orange has been used as a vat dye for textiles.

Pigment Name

PR254-Pyrrole Red

Pigment Type

organic, aminoketone

Chemical Name

Bis-(p-chrolopheny)-1. 4-diketopyrrolo(3. 4-c)pyrrole

Chemical Formula

Properties

Pyrrole Red is opaque and has strong covering power. According to manufacturer Ciba, which uses the trade name Irgazin Red, it is a “clean, highly saturated mid shade red with high temperature resistance, excellent color strength, outstanding chemical, solvent and bleed resistance, and good weatherfastness.”

Permanence

Pyrrole Red is considered to have excellent lightfastness among organic pigments in its class. Tests in industrial applications have given it scores of 7-8 on the Blue Wool Scale.

Toxicity

According to the Australian government's Ministry on Health and Aging, "The notified chemical exhibited low oral and dermal toxicity in rats, did not exhibit toxic effects when administered orally to rats for 28 days, was not a skin irritant in rabbi

History

Pyrrole Red, used as an automotive paint and as a colorant in plastics, was developed as one of a range of pigments to replace lead based pigments. In art materials, it is often used as a synthetic and lightfast replacement for carmine, a laked pigment that was originally produced from the body of the cochineal insect. It is also used to replace the older naphthol reds, organic red pigments that are sometimes only marginally lightfast and weatherfast.