Called Also Mineral Yellow Has Improperly Been Classed As An
:
ON THE PRIMARY, YELLOW.
orpiment, from which it differs in not being a sulphide, and in
containing lead. It is prepared from arsenic fluxed with litharge, and
reduced to powder. It is much like orpiment in colour, dries better, and
not being affected by lead, is less liable to change in tint. The
presence of the litharge, however, renders it subject to be blackened by
sulphuretted hydrogen. Of course it is poisonous.