The Dyeing of Cotton Fabrics: A Practical Handbook for the Dyer and Student

by Franklin Beech

Black and Blue.—First bath, 3½ lb. Naphthol black 3 B and 10 lb. bisulphate of soda. Second bath, 2 lb. Diamine sky blue and 13 lb. Glauber's salt. Third bath, 6½ oz. New Methylene blue N. Work as in the last recipe.

Green and Claret.—First bath, 3½ lb. Naphthol red C and 10 lb. bisulphate of soda. Second bath, 2 lb. Diamine sky blue F F, 1¼ lb. Thioflavine S, and 15 lb. Glauber's salt.

Gold Brown and Blue.—First bath, 2½ oz. orange E N Z, 1½ oz. Orange G G, ¼ oz. Cyanole extra and 10 lb. bisulphate of soda. Second bath, 14 oz. Diamine sky blue F F and 15 lb. Glauber's salt.

Dark Brown and Blue.—First bath, ½ lb. Orange G G, 1½ oz. Orange E N Z, 1½ oz. Cyanole extra and 10 lb. bisulphate of soda. Second bath, 12 oz. Diamine sky blue F F and 15 lb. Glauber's salt.

Black and Green Blue.—First bath, 3 lb. Orange G G, 1 lb. Brilliant cochineal 4 R, 1 lb. Fast acid green B N and 10 lb. Glauber's salt. Second bath, 1¾ lb. Diamine sky blue F F, 3¼ lb. Thioflavine S and 15 lb. Glauber's salt.

We may here note that in all the above recipes the second bath (for dying the cotton) should be used cold or at lukewarm heat and as strong as possible. It is not completely exhausted of colour, only about one-half going on the fibre. If kept as a standing bath this feature should be borne in mind, and less dye-stuff used in the dyeing of the second and following lots of goods.

Blue and Gold Yellow.—3 lb. Diamine orange G, 13 oz. Naphthol blue G, 14½ oz. Formyl violet S 4 B and 15 lb. Glauber's salt. Work at just under the boil.

Brown and Blue.—1 lb. Diamine steel blue L, 9½ oz. Diamine sky blue, 1 lb. Orange E N Z, 1 lb. Indian yellow G, 1¾ oz. Naphthol blue black and 15 lb. Glauber s salt. Work at 170° to 180° F.

In these two last recipes only one bath is used, all the

dyes being added at once. This is possible if care be taken that dye-stuffs of two kinds are used, one or more which will dye wool and not cotton from neutral baths, and those direct dyes which dye cotton better than wool. The temperature should also be kept below the boil and carefully regulated as the operation proceeds and the results begin to show themselves.