Gamblin 1980 Oils -andnbsp;PG7-Phthalo Green (Chlorinated polychlorinated copper(II) phthalocyanine)

Phthalo Green: A dark bluish green more closely resembles Verdigris than Viridian. First manufactured in 1927, Phthalo Green has a very high tinting strength and transparency. Consider using Phthalo Emerald, a warmer and more natural-looking colour.

Pigmentandnbsp;Composition and Permanence:andnbsp;

Pigment Name: PG7-Phthalo Green

Pigment Type: Organicandnbsp;

Properties

Phthalo Green is a transparent, cool, bright, high-intensity colour used in oil and acrylics. It comes from a Phthalocyanine Blue pigment where most hydrogen atoms have been replaced with chlorine, forming highly stable molecules. It has similar pigment properties and permanence to Phthalo Blue.

It is slow drying and an excellent base colour for mixing a range of bright greens.

Phthalo Green is considered an excellent alternative to Viridian because it is intense and mixes well, and can be used to emphasize mineral colours in various tints. However, its tinting strength is very high so it can overpower other colours. This pigment most closely resembles the discontinued and toxic Verdigris.

Permanence

Phthalo Greens are completely lightfast and resistant to alkali, acids, solvents, heat, and ultraviolet radiation. Due to their stability, they are currently used in inks, coatings, and many plastics and are considered a standard pigment in printing ink and the packaging industry.

Toxicity

Phthalo Green has no significant hazards, but it contained PCBs (polychlorinated biphenyls) until 1982.

History

This bright blue-green was developed in 1935 and has been used since 1938.