Naphthol Red AS
PR146
Alternate Name
Naphthol Carmine FBB
Pigment Description
Naphthol Red AS is one of several colors with the same name but different pigment codes. According to some older sources, this pigment has a lightfastness about on par with genuine Alizarin Crimson (ASTM III). Somewhere between decent and fugitive, this pigment is not recommended. Additionally, in Monona Rossol's research it states that when this pigment is metabolized, a derivative of PR146 may create a carcinogen, so please consult her writing.
Resources
PR146 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
General information about this class of pigments from Handprint,
Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.
Stats
Lightfastness
Fair, May be Decent to Poor
ASTM III is too low for us. May range from II to III. The 1980s NPIRI only listed figures for indoor exposures, and they reported slight change in masstone with appreciable fading in tints.
Transparency
Transparent, Semi-Opaque
Toxicity
Lower Concern
Treat all pigments and paints with studio safety protocols.
Chemical Name
Monoazo, 3-hydroxy-2-naphthanilide
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