This section is from the book "Paint And Varnish Facts And Formulae", by J. N. Hoff. Also available from Amazon: The Industrial And Artistic Technology Of Paint And Varnish.
Green Oxide Of Chromium Or True Chrome Green is a permanent color produced by reducing bichromate of potassium with sulphur or starch by a suitable process. It is a greyish green powder and has considerable body. Its use is confined to artists.
It is found also in nature as chrome ochre containing a small percentage of oxide of chromium mixed with clay.
 
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