Black, I′vory

Syn. Car′bo eb′or is , E′bur us′tum ni′grum , L.; Noir d′ivoire , ., Fr.; Elfenbeinschwartz , Kohle von elfenbein , Ger. From waste fragments and turnings of ivory, by careful exposure in covered crucibles, avoiding exce of heat or over-burning. The whole having been allowed to become quite cold, the crucibles are opened and their contents reduced to fine powder. For the first quality only the richest coloured portion of the charcoal is selected, and this, after being powdered, is ground with water on porphyry, washed on a filter with warm water, and then dried. A very rich and beautiful black. It is brighter than even peach-stone black, and is quite free from the reddish tinge of bone-black. With white-lead it forms a rich pearl-grey. See Bone-black .