Color Swatch created using heavy application/diluted application and was applied on cold press watercolor paper (150 lb) material.
This color contains the following pigments:
PY151—Benzimidazolone Yellow
Pigment Type
oranic, monoazo
Chemical Name
n/a
Chemical Formula
n/a
Properties
Benzimidazolone Yellow is a greenish yellow pigment with dull tints and an average drying time. It mixes very cleanly. It mixes cleanly with both Phthalo Green and Titanium White. Although more expensive than many Hansa and Diarylide pigments, its mixing properties, durability, and lightfastness have won it many customers.
Permanence
Benzimidazolone Yellow has excellent lightfastness and durability. This has made it an extremely important pigment in the printing industry, for applications where lightfastness is a primary consideration. Though it is not absolutely lightfast, it ranks extremely well among organic yellows.
Toxicity
Benzimidazolone Yellow 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.
Alternate Names
Benzimidazolone.
PY153—Nickel Dioxine Yellow
Pigment Type
organic synthetic
Chemical Name
n/a
Chemical Formula
C28H12N2O2
Properties
Nickel dioxine yellow is a semi-transparent, lightly staining yellow pigment with high tinting strength, although less than that of the diarylides. It is considered a good color match for Indian
Yellow, a historic pigment that is no longer available. Drying time is average.
Permanence
Nickel Dioxine Yellow has excellent lightfastness.
Toxicity
Nickel metal is toxic and may irritate skin.
History
Unknown.
Alternate Names
Dioxine Yellow Nickel.
PR251—Pyrazoloquinazolone Scarlet
Pigment Type
organic
Chemical Name
n/a
Chemical Formula
n/a
Properties
Pyrazoloquinazolone Scarlet is a semi-opaque, staining pigment that is a brilliant scarlet red, and has high tinting strength.
Permanence
Pyrazoloquinazolone Scarlet has excellent lightfastness.
Toxicity
Pyrazoloquinazolone Scarlet has no acute toxicity.
History
Pyrazoloquinazolone Scarlet is a contemporary substitute for Vermilion, a pigment that contains toxic mercuric sulfide.
Alternate Names
Permanent Red. Vermilion Red.
