Mineral Black

: ON THE NEUTRAL, BLACK.

is a native impure carbon of soft texture, found in Devonshire. Blacker

than plumbago, and free from its metallic lustre, it is of a neutral

colour, greyer and more opaque than ivory black, and forms pure neutral

tints. Being perfectly durable, and drying well in oil, it is of value

in dead colouring on account of its solid body, as a preparation for

black and deep colours before glazing. It would likewise be the most

permanent and best possible black for frescoes.



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