Maimeri Classico Oil Colors - Cerulean Blue, 60 ml tube

This color contains the following pigments:

PB15:3-Phthalo Blue

PB36-Cobalt Chromite Blue Green Spinel

Pigment Name

PB15:3-Phthalo Blue

Pigment Type

organic

Chemical Name

beta copper phthalocyanine

Chemical Formula

C32H16CuN8

Properties

Phthalo Blue PB15:3 is a structural variant of Phthalo Blue PB15 that produces more greenish tones.

Permanence

Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. They are currently used in inks, coatings, and many plastics due to their stability and are considered a standard pigment in printing ink and the packaging industry.

Toxicity

Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).

History

Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff now known as Phthalo Blue was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark color was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted a cyan to replace Prussian Blue.

Pigment Name

PB36-Cobalt Chromite Blue Green Spinel

Pigment Type

inorganic

Chemical Name

Oxides of Cobalt and Chromium

Chemical Formula

Co(Al,Cr)2O4

Properties

Cobalt Chromite Blue is an opaque pigment with moderately low tinting strength.

Permanence

Cobalt salts have excellent lightfastness and temperature stability.

Toxicity

Cobalt salts are toxic when ingested or inhaled, and slightly toxic on contact with the skin. Evidence of Chromium(III) carcinogenicity is inconclusive. Chromium(III) salts appear in greenish pigments.

History