element
Colcothar
A brown-red iron oxide residue of vitriol work — polishing rouge of older labs. Not crocus-martis as the saffron-named calx alone, and not polishing-rouge as the grit alone.
element
A brown-red iron oxide residue of vitriol work — polishing rouge of older labs. Not crocus-martis as the saffron-named calx alone, and not polishing-rouge as the grit alone.