Catechu, [33], [35], [36], [122-6].

Caustic Soda. Carbonate of soda, boiled with lime.

Chestnut, [35].

Chrome, [32], [33].

Cinnamon, [102].

Claret, [51], [84].

Coal Tar Colours. Colours obtained by distillation and chemical treatment from coal tar, a product of coal during the making of gas. There are over 2,000 colours in use.

Cochineal, [92-7], [132].

Copper, [33-5].

Copper sulphate, [33].