By mixing together the various Diamine blues a very great range of shades can be produced, from pale sky-blue tints to the deepest of blues.
Bright Blue.—Dye with 2¼ lb. Dianil blue B and 20 lb. Glauber's salt; fix with 3 lb. of fluoride of chromium.
Dark Blue.—Dye with 3 lb. Dianil blue B, 1 lb. Dianil dark blue R, 1 lb. soda and 20 lb. salt, fixing with 3 lb. fluoride of chromium.
Red Violet.—Dye with 1 lb. Dianil blue 4 R and 10 lb, salt, fixing with 4 lb. fluoride of chromium.
Dark Plum.—Dye with 3 lb. Dianil blue 4 R and 15 lb. salt, fixing with 4 lb. fluoride of chromium.
Red Violet.—Dye with 1 lb. Diamine blue 3 R, 1 lb. soda
and 10 lb. Glauber's salt, fixing with 1½ lb. sulphate of copper and 1 lb. acetic acid.
Red Plum.—Use 3¾ lb. Diamine blue 3 R, 3 lb. soda and 20 lb. Glauber's salt, fixing with 5 lb. sulphate of copper and 2 lb. acetic acid.
Dark Brown.—Prepare the dye-bath with 5 lb. Diamine catechine B, 3 lb. soda and 15 lb. Glauber's salt and dye at the boil for one hour, then treat with 2 lb. sulphate of copper and 2 lb. bichromate of potash.
Brown.—Prepare the dye-bath with 4 lb. Paramine brown C, 20 lb. Glauber's salt, 2 lb. soda and dye at the boil for one hour; treat with 3 lb. copper sulphate.