definition
Lead monoxide, PbO, obtained as a yellow amorphous powder, the fused and crystalline form of which is called litharge; lead ocher. It is used as a pigment; also, lead oxide yellow, as opposed to red lead, which is lead tetroxide Pb3O4.
It is manufactured in two forms, known as "massicot" and "litharge."
Massicot is the raw material for the manufacture of "red lead" or "minium."
Red lead or triplumbic tetroxide, Pb304, is a scarlet crystalline powder of specific gravity 8.6-9.1, obtained by roasting very finely divided pure massicot or lead carbonate; the brightness of the colour depends in a great measure on the roasting.
Lead acetate, Pb(C2H302)2.3H20 (called "sugar" of lead, on account of its sweetish taste), is manufactured by dissolving massicot in aqueous acetic acid.