Frankfort Black

_Frankfort Black_ is said to be made of the lees of wine from which the tartar has been washed, by burning, in the manner of ivory black; although the inferior sort is merely the levigated charcoal of woods, of which the hardest, such as box and ebony, yield the best.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field