Phthalocyanine Green immediately found its way into artists materials but met resistance at first in oil paint and watercolors because the well entrenched Viridian was popular. It was also a weaker and dirtier color than Phthalo Green and artists tended to see the cleaner color as garish along side the older pigment. When acrylics were introduced in the late 1950’s viridian proved to be unsuitable for the new medium so Phthalo Green became the standard dark green in acrylic ranges. Its many excellent qualities quickly became apparent to more and more artists causing its popularity to increase in other media as well. Today very little viridian is sold compared to the use of Phthalocyanine Green in all media and it remains as the standard dark green for acrylics.
Chemical Description: Chlorinated Copper phthalocyanine
Pigment Number: PG7
Lightfastness Rating: ASTM I
Pigment Opacity: Transparent
Paint Opacity: Transparent