Gamboge

Gamboge is a partially transparent deep saffron to mustard yellow pigment. Used in Nashiji-urushi. It is also used to dye Buddhist monks’ robes because the colour is a deep tone of saffron, the traditional colour used for the robes of Theravada Buddhist monks. It was this pigment that was used to prove Brownian motion by the physicist Jean Perrin in 1908.

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