Cobalt violet (PV14)
The cobalt violet we know today was first manufactured in 1859 by the French chemist Salvetat, the manufacturing process is costly which made the pigment expensive, that it is also very weak, which can…
The cobalt violet we know today was first manufactured in 1859 by the French chemist Salvetat, the manufacturing process is costly which made the pigment expensive, that it is also very weak, which can…