A dense pale yellow pigment composed of lead monoxide. Massicot is the name used for both the native mineral as well as the lead monoxide product made by heating lead carbonate to 300C. Also called giallorino, Massicot production can be dated back to the Middle Ages.

It was often confused with Lead Tin Yellow as the term Massi- cot was historically interchangeable with any lead based yellow pigment.

Not to be confused with Litharge. Although holding the same chemical constituents, it was manufactured in a different man- ner and was speci cally built as a drying agent for oil paints.