A type of organic color pigment used in printing inks derived from dichlorobenzidine. Diarylide Yellows are strong pigments (stronger than the Hansa Yellows which they have replaced in many applications), and range from lemon to golden yellow and from opaque to transparent (see color index reference chart below). Diarylide Yellows range from moderately to extremely lightfast, and they have high alkali resistance and can withstand heat very admirably. Their particle size is small and easily absorb oil, which makes obtaining desired flow characteristics somewhat difficult, but recent developments have made them more easily dispersible. They are the most commonly used yellow pigments in printing inks, especially for three- and four-color process color printing. (See also Organic Color Pigments.)
('CI Pigment Yellow 12, 13, 14, 17, 55, 83'.)
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