Deep Black.—Prepare the dye-bath with 5½ lb. Diamine deep black R B, 2 lb. soda, 20 lb. Glauber's salt. Dye at the boil for one hour; lift, wash and dry.
Black.—Prepare the dye-bath with 5 lb. Direct triamine black G X, 15 lb. Glauber's salt. Dye for one hour at the
boil; lift, rinse and dry. In working for from two to three hours the dye-bath will exhaust completely.
Black.—Prepare the dye-bath with 5 lb. Oxydiamine black A, 20 lb. Glauber's salt, 2 lb. soda. Dye at the boil for one hour.
Black.—Prepare the dye-bath with 6 lb. Pluto black B. Dye at the boil for one hour with the addition of ¾ to 1¼ oz. Glauber's salt, ½ to ¾ oz. soda ash per gallon of liquor. To develop the shade it is necessary to dye in a boiling liquor.
Black.—Use 2½ lb. Diamine jet black Cr, 2½ lb. Diamine jet black R B, 2 lb. soda, and 20 lb. Glauber's salt, working at the boil for one hour.
Black.—Use 6 lb. Oxydiamine black N R, 2 lb. soda and 20 lb. Glauber's salt, working at the boil for one hour.
Black.—Use 6 lb. Columbia Black F B B, 3 lb. soda and 20 lb. Glauber's salt, working at the boil to shade.
Besides the blacks given in the above recipes, there are other brands which are used in the same way, and vary slightly in the shade of black they give.
All the direct blacks require working in strong baths to give anything like black shades; they all have, more or less, a bluish tone, which can be changed to a jetter shade by the addition of a yellow or green dye in small proportions, which has been done in one of the recipes given above.