Chrome yellow, chemically known as lead chromate (PbCrO₄), is a bright and vibrant pigment historically celebrated for its intense color. First synthesized in 1809 by the French chemist Louis Nicolas Vauquelin, it rapidly gained popularity as an affordable alternative to traditional yellow pigments like orpiment. The pigment’s name stems from chromium, the element discovered during Vauquelin’s experiments on the mineral crocoite, a natural source of lead chromate.
The production of chrome yellow involves a chemical precipitation process. Lead salts react with chromate or dichromate compounds in an aqueous solution, forming fine particles of lead chromate. By adjusting reaction conditions, manufacturers can produce various shades, ranging from pale primrose yellow to deep, rich oranges. Smaller particle sizes yield lighter hues, while larger particles create darker tones. To enhance stability and performance, surface treatments are often applied, protecting the pigment from environmental degradation.
Post time: Jun-13-2025