A lovely clear transparent brown with good chroma. PBr25 is a Monoazo with reportedly excellent lightfastness. This is an interesting brown that we'd love to encounter more often.
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Benzimidazolone Brown
PBr25
Alternate Name
Imidazolone Brown
Pigment Description
Resources
PBr25 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
Information about PBr25 from Bruce MacEvoy, Handprint Guide to Watercolors, General information about this class of pigments from Handprint,
Stats
Lightfastness
Excellent
Considered ASTM I, excellent. Note however that this color was not included in the recent lightfastness testing in oil with various mixing whites. Bruce MacEvoy found it to perform as Excellent in watercolor.
Transparency
Transparent
Toxicity
Thought to be in the category of lesser concern
Treat all pigments and paints with studio safety protocols.
Chemical Name
monoazo benzimidazolone
Dry Pigments listing PBr25
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