... Characteristics: Chrome Yellow is a natural yellow pigment made of lead(II) chromateBecause the pigment tends to oxidize and darken on exposure ... to air over time, and it contains lead, a toxic, heavy metal, it has been largely replaced by ... )5Alkali Fastness,(Grade)5Acid Fastness, (Grade)5Linseed Fastness, (Grade)5Total Lead Content,%(m/m)50.0Lead Chromate Content, %(m/m) 90 ...