The ground is composed of Venetian red, red lead and a small quantity of chrome yellow, mixed with oil and turpentine in equal parts. Or additional brilliancy may be given to the color by vermilion or lake instead of Venetian red. While the ground is wet, dab on spots of white, using either a piece of sponge or a tool, and soften with a badger, subsequently repeating the white touches in parts to give them increased brilliancy. Spots of blue, brown or yellow may be added in the same manner. When nearly dry, veins and threads may be put in with a camel's hair pencil.