It is always great to see a red with excellent lightfastness ratings, and extra interesting that this one is transparent. Guerra still has some of this pigment and they list it as a red leaning toward orange. Unfortunately this color was discontinued, so this is one of their extinct pigments.
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Pigment Red 197
PR197
Alternate Name
Indo Double Scarlet
Pigment Description
Resources
PR197 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
Stats
Lightfastness
Excellent
Highest marks on the BWS (all 8's)
Transparency
Transparent
Toxicity
Thought to be in the category of lesser concern
Treat all pigments and paints with studio safety protocols.
Chemical Name
Anthraquinone, Polycarbocyclic Anthraquinone
Dry Pigments listing PR197
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