Pintura Acrílica Violeta Ultramar 500 ml - Fine Arts

Colour: Ultramarine Violet
Lightfastness: AA
Opacity: Semi-opaque
Pigment: PV15
Pigment description: Aluminium and Sodium Sulphosilicate
ASTM Lightfastness Classification: I
Pigment classification: Synthetic inorganic
Colour Index Number: 77007
Viscosity range (mPa.s): 20,000 - 25,000

Colour Index
The pigments used are both inorganic and organic. Inorganic pigments have been used since ancient times and most 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 these are now synthesised through industrial processes. Organic pigments are more modern, developed in the early 20th century thanks to new synthesis methods in Organic Chemistry. These synthetic pigments are now a very important group in the manufacture of artists’ colours, producing bright and luminous tones of extraordinary intensity. The range of organic pigments is currently very extensive and includes azo pigments, phthalocyanine blues and greens, dioxazines, pyrroles, anthraquinones, quinacridones, and more.
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