The navy blues given in the last few recipes possess the merit of considerable resistance to light, air and milling.
Pale Blue.--Make the dye-bath with 1/2 oz. Chromotrop 2 R, 4 oz. Cyanine B, 7-1/2 oz. Fast Acid Blue R, 1/2 oz. Azo Yellow, 10 lb. acetic acid, and 15 lb. Glauber's salt.
Peacock Blue.--A fine shade is dyed with 14 oz. Cyanine B, 1-1/2 lb. Fast Acid Blue R, 2 oz. Azo Yellow, 10 lb. acetic acid, and 15 lb. Glauber's salt.
Dark Invisible Blue.--Make the dye-bath with 2 lb. Victoria Black Blue, 10 lb. Glauber's salt, and 3 lb. sulphuric acid.
Bright Blue.--A very fine shade of blue, not, however, fast to light, is dyed from a bath containing 1/2 lb. Victoria Blue B, and 10 lb. Glauber's salt.
Bright Electric Blue.--Prepare a dye-bath with 3/4 lb. Glacier Blue, 10 lb. Glauber's salt and 3 lb. sulphuric acid, working at the boil. This gives a very bright green shade of blue.
Dark Peacock Blue.--Make the dye-bath with 1 lb. Naphthol Blue Black, 10 lb. Glauber's salt, and 3 lb. sulphuric acid.
Peri Wool Blues B & G dye wool in very fast dark blue shades from baths of Glauber's salt and acetic acid. They are dye-stuffs which form with copper blue colour lakes of some fastness. The copper is amalgamated with the dye-stuffs as put on the market.
Pale Navy Blue.--Mordant, 4 lb. bichromate of potash and 1-1/2 lb. oxalic acid. Dye, 2-1/2 lb. Alizarine Bordeaux B.
Navy Blue.--Mordant, 4 lb. bichromate of potash and 2 lb. oxalic acid. Dye, 7 lb. Alizarine Bordeaux G.