Lead monoxide (also called
Lead protoxide),
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. It is also called
lead oxide yellow, as opposed to
red lead, which is lead tetroxide
Pb3O4. [
1913 Webster]
" Massicot is sometimes used by painters, and also as a drier in the composition of ointments and plasters."
[1913 Webster]