Indian Yellow

Indian Yellow. Two colouring materials are known under this name - (1) an organic dye, known also as azo-yellow or azo-ftavin; (2) a pigment, known also as purree, which is extensively employed in India for the manufacture of paints for woodwork, etc., or of water-colours. It is prepared from the urine of cows fed upon mango leaves, and comes into commerce in the form of round balls of a yellow colour.