Molybdenum Green

: ON THE SECONDARY, GREEN.

A clear malachite green colour, when dried, is produced from molybdate

of soda and potash-chrome-alum, or from the molybdate and alum with

ammonia. Being more expensive than the chrome oxides and not better, its

introduction, for use by artists, would be attended with no advantage.



There is likewise obtainable a copper molybdate, by adding neutral

molybdate of soda in excess to sulphate of copper. The precipitate is a

very pale green colour, flocculent at first, but crystalline after

washing. Like the chrome molybdate it would be superfluous as a pigment.



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