Nitroso Green
PG8
Alternate Name
Pigment Green B
Pigment Description
Nitroso Green. Fortunately many of the worst colors have been weeded out of artist paints over the past couple of decades, however among paints that still circulate sometimes (of the ASTM III variety), this color has the unfortunate honor of being one of the lowest performing modern colors for lightfastness in tints. It has a perilously low blue wool rating of 2, depending on the manufacturer.
Resources
PG8 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
Information about PG8 from Bruce MacEvoy, Handprint Guide to Watercolors, General information about this class of pigments from Handprint,
Stats
Lightfastness
Poor
The NPIRI from the 1980s noted Appreciable fading in both masstone and tints in outdoor exposures. This color is not lightfast enough, as it is the low end of moderate to poor. May fall to BWS 3.
Transparency
Semi-Transparent, Semi-Opaque
Toxicity
Hazard, Use more caution
Low acute toxicity, not enough study done on chronic hazards (source, Monona Rossol).
Chemical Name
Nitroso: ferric-nitroso-beta-naphthol
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