Cobalt green

/ ko • bawlt   green /

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About the chemical structure:

Chemical name: Cobalt(II)-oxide-zinc(II)-oxide
Formula: CoO · ZnO
Refractive index: n/a


Color Index (C.I.) PG 19

How can you identify Cobalt green?


OM: Cobalt green appears as fine, rounded and transparent particles under the microscope.


It's identified by means of Raman

Raman spectra: University College London;

Usage and handling:

Permanence: Toxicity:

Lightfast: good

Degradation processes: most sources considered it to be absolutely permanent as most pigments produced at high temperatures are. However, tests made in 1847 and published in 1910 showed a browning of the color in full-strength and a fading of it when mixed with lead white. Artists did not favor cobalt green although it could safely be mixed with all other pigments and was a fast drier in oil. Field called it, "chemically good and artistically bad"

non toxic.

MSDS: Holbein


Cobaltpigmente (at Pigmentlexikon by Th. Seilnacht)