Orange Yellow (Azo)

Color: Orange Yellow (Azo)
Lightfastness: A
Opacity: Transparent
Pigment: PY83
Pigment description: Yellow Diarylamide
ASTM Lightfastness classification: I
Pigment classification: Synthetic Organic
Color Index Number: 21108
Viscosity range (mPa.s): 15.000 - 20.000

Color Index
The pigments used are both inorganic and organic. The inorganic ones have been used since antiquity and the great majority come from or are extracted from minerals and clays, such as natural earths, siennas, and ochres. Titanium, carbon, ultramarine blue, cobalt and cadmium pigments also belong to this category. Many of them are currently synthesised in industrial processes. Organic pigments are more modern, developed at the beginning of the 20th century thanks to new synthesis methods in Organic Chemistry. These synthetic pigments are now a very important group in the manufacture of colours for artists, producing bright and luminous shades with extraordinary intensity and excellent stability and permanence. The range of organic pigments is currently very extensive and covers azo pigments, blues, phthalocyanine greens, dioxazines, pyrroles, anthraquinones, quinacridones, etc.
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