Yellow. Diluted nitric acid will produce a fine yellow on wood; sometimes it makes a brown, and if used strong, it will be nearly black.
Mahogany Color Is produced by a mixture of madder, Brazil wood, and logwood, dissolved in water and put on hot. The proportions must be varied, according to the tint required.
Black. Brush the wood several times over with a hot decoction of logwood, and then with an iron lacquer; or, if this cannot be had, a strong solution of nut-galls.
Red can be made by a solution of dragon's blood in spirits of wine. This stain is to be laid on the wood boiling hot, and before it dries it should be laid over with alum water.
Blue. Ivory may be stained blue thus: Soak the ivory in a solution of verdigris and nitric acid, which will make it green, then dip it into a solution of pearlash boiling hot, and it will turn blue.
To stain ivory, black, the same process as for wood may be employed.
Purple may be produced by soaking the ivory in a solution of sal-ammoniac and four times its weight of nitrous acid.