1.1 This specification covers the pigment commercially known as bone black, ivory black, or drop black. The pigment may be purchased in the dry form or as an aqueous dispersion. 1.2 The values stated in SI units are to b This specification covers bone black, ivory black, or drop black pigment. The pigment may be in dry form or in aqueous dispersion. Dry pigment shall be made by the calcinations of bones, unmixed with any other substance. Dry pigment shall compose of as