Payne's Grey

Colour: Payne's Grey
Lightfastness: AA
Opacity: Opaque
Pigment: PB29, PBk11, PY42
Pigment description: Sodium Sulphosilicate of Aluminium, Synthetic Black Iron Oxide, Synthetic Iron Oxide
ASTM Lightfastness classification: I
Pigment classification: Mixture
Colour Index Number: -
Viscosity range (mPa.s): 15,000 - 20,000

Colour Index
The pigments used are both inorganic and organic. Inorganic pigments 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 tones with extraordinary intensity and excellent stability and permanence. The range of organic pigments is currently very extensive and includes azo pigments, blues, green phthalocyanines, dioxazines, pyrroles, anthraquinones, quinacridones, etc.
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