Azomethine Yellow (Copper)
A rare green-yellow which was unfortunately discontinued. Some sources listed excellent lightfastness, others decent to excellent. Currently it is still offered by one oil paint maker.
PY117 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
Information about PY117 from Bruce MacEvoy, Handprint Guide to Watercolors, General information about this class of pigments from Handprint,
Variable
Some sources, such as the old 1980s tests reported by the NPIRI are very good or even excellent for lightfastness, however, see Bruce MacEvoy’s tests in watercolor.
Transparent
Low Concern, but caution, contains copper
Low amount of information, but NPIRI notes it contains copper, so please see Monona Rossol’s work on handling copper-containing pigments for possible hazards.
copper organic complex
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