Color Swatch created using heavy application/diluted application and was applied on cold press watercolor paper (150 lb) material.
Color Description
Schmincke's Neutral Gray is mixed from complementary colors without black content. It remains color neutral even after mixing with white.
This color contains the following pigments:
PO62—Benzimidazolone Orange
Pigment Type
organic, monoazo
Chemical Name
n/a
Chemical Formula
C17H13ClN6O5
Properties
Benzimidazolone Orange is a staining, yellowish orange pigment that can become dull in tints. It has an average drying time, and it loses some of its intensity as it dries. The yellowish orange varieties are more transparent.
Permanence
Benzimidazolone Orange has excellent lightfastness and outstanding heat and solvent stability for a monoazo pigment.
Toxicity
Benzimidazolone Orange is not considered toxic.
History
The benzimidazolone group of pigments was developed and patented in 1960 by Hoechst A.G., a German chemical manufacturer that was a forerunner of the pharmaceutical company Aventis. Use of benzimidazolone pigments in the auto industry, especially Benzimidazolone Orange, became common in the 1980s because they were common replacements for lead chromate pigments, which were phased out during this period.
Alternate Names
Permanent Orange, Benzimida Orange
PR255—Coral Red
Pigment Type
organic
Chemical Name
n/a
Chemical Formula
n/a
Properties
Ciba describes PR255 as a yellowish red pigment with medium hiding power and excellent weather resistance, recommended for use in high grade decorative and industrial paints.
Permanence
Pigment Red 255 has excellent lightfastness and weatherfastness at full strength, and can be used for outdoor applications.
Toxicity
n/a
History
Pigment Red 255 has been used in paint, plastics, printing inks, and automotive finishes.
Alternate Names
Pyrrole Scarlet.
PB60—Indanthrene Blue
Pigment Type
organic, vat dyes
Chemical Name
complex, insoluble anthraquinone
Chemical Formula
C28H14N2O4
Properties
Indanthrene Blue is a clear, clean, deep blue organic pigment. It has moderate to high tinting strength and is not as overpowering as Phthalo Blue. Hansa Yellow Deep, Benzimidazolone Orange, and Raw Umber are its best mixing complements.
Permanence
Indanthrene Blue is permanent with excellent lightfastness in both masstone and tints.
Toxicity
Indanthrene Blue varies in its acute toxicity, though toxicity is generally slight.
History
Indanthrene Blue is the oldest vat dye, discovered and patented in 1901 by Rene Bohn. It is considered the first anthraquinone vat dye, a group of dyes characterized by excellent lightfastness. The pigment originates from this dye.
Alternate Names
Indanthrone.
