Blue Ashes Or Mountain Blue

are both hydrated carbonates of copper, the first being artificially

prepared, and the second found native in Cumberland. Neither is durable,

especially in oil; and, as pigments, both are precisely of the character

of verditer. By treating the natural malachite green with an alkali, it

may be converted into blue.

Black Ochre Blue Carmine facebooktwittergoogle_plusredditpinterestlinkedinmail