Internet Colors - Set of 1035 Chrome Yellow Color 190 - # FFA700
Chrome Yellow is a natural yellow pigment made of lead (II) chromate (PbCrO4).
It was first extracted from the mineral crocoite by the French chemist Louis
Vauquelin in 1797.
Because 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
another pigment, Cadmium Yellow (mixed with enough Cadmium Orange to produce a
color equivalent to chrome yellow). Cadmium pigments on their own are toxic as
well from the cadmium content, and have themselves been replaced with azo
pigments.
Chrome yellow is commonly produced by mixing solutions of lead nitrate and
potassium chromate and filtering off the lead chromate precipitate.
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Shown is a school bus in the color of Chrome Yellow | |
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