Schmincke Soft Pastel - Permanent Red 3 Deep 044D

Pigment Information

This color contains the following pigments:

PR3-Toluidine Red

PR112-Naphthol Red AS-D

PR242-Pigment Red 242

PR178-Perylene Red

Pigment Name

PR3-Toluidine Red

Pigment Type

organic, monoazo

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

PR112-Naphthol Red AS-D

Pigment Type

organic, monoazo

Chemical Formula

C24H16Cl3N3O2

Properties

This Naphthol Red is an intense scarlet red pigment that is heavily staining. It has an average drying time. It is semi-transparent and has relatively poor covering power.

Permanence

This Naphthol Red has been rated as having excellent lightfastness under ASTM testing, but other testing methods have demonstrated some tendancy for the color to fade with exposure to strong ultraviolet light. It has been considered a replacement for less lightfast naphthol reds such as PR3. Not suitable for exterior use.

Toxicity

Naphthol Reds are not considered toxic. Naphthol Red AS-D may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.

History

Unknown.

Pigment Name

PR242-Pigment Red 242

Pigment Type

organic, disazo condensation

Properties

A bright yellowish red, often referred to as scarlet. It has average tinting strength.

Permanence

It has excellent resistance to solvents, acids, and alkali, and is heat stable up to 300°C. Disazo condensation compounds have very good lightfastness for organic pigments.

History

Pigment Red 242 is used to color plastics, paints, and printing inks.

Pigment Name

PR178-Perylene Red

Pigment Type

organic, anthraquinone

Chemical Formula

C48H26N6O4

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. Its partial transparency makes it useful as a glazing color.

Permanence

Perylene Red has excellent lightfastness and permanence, but 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.