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:
PO16—Dianisidine Orange
Pigment Type
organic, disazo
Chemical Name
n/a
Chemical Formula
C34H32N6O6
Properties
Dianisidine Orange is a semi-opaque orange dye that can be laked to form a pigment. This pigment ranges from yellowish to reddish orange in different laked forms.
Permanence
Dianisidine Orange has only fair lightfastness.
Toxicity
A Japanese study in which rats were given large daily doses of Dianisidine Orange revealed no acute toxicity or mutagenic effects.
History
Dianisidine Orange is used mostly in coloring plastics and in inks, in applications where safety is important but lightfastness and longevity are not paramount.
Alternate Names
Benzidine Orange R
PR48—Permanent Red
Pigment Type
organic, monoazo
Chemical Name
beta-oxynaphthoic acid lake
Chemical Formula
n/a
Properties
Beta-oxynaphthoic acid (BONA) lake pigments vary in their hue and other properties, depending on what metals they form a salt with. Both pure and mixed metal salts are used. They tend to have high tinting strength and good stability and lightfastness.
Permanence
Beta-oxynaphthoic acid lake pigments tend to have high tinting strength and good stability and lightfastness, but results vary with the application, and the presense of titanium dioxide may reduce lightfastness.
Toxicity
n/a
History
Beta-oxynaphthoic acid may have been synthesized as early as 1887. Commerical use of BONA lake pigments began in the 20th century.
Alternate Names
Brilliant Red, Ruby Red