mandarining

Noun

 * 1) The use of dilute nitric acid to give an orange colour to goods formed of animal tissue, such as silk or wool.
 * 2) * 1852-1866,, Cyclopaedia of Useful Arts and Manufactures
 * By this method, which is called mandarining, an orange colour is given to silk and wool, not from the solution of a colouring matter, but by producing a certain change in the fibre by the action of dilute nitric acid.