For a green colour, take 4 1/4 gal. indigotine precipitate, 18 lb. powdered gum Senegal, stirring till dissolved; 11 lb. nitrate of lead, and 11 lb. white sugar of lead, both in powder. The mixture is stirred till all is dissolved, and is then strained. Compound colours are made by mixing the blue and green with each other, or with ordinary mordants for dyeing. With the blue and green above described, and with the ordinary iron and alum mordants (as used in madder-work), print calico, and, after cooling, age the pieces for a night. They are then fixed by passing into a solution of silicate of soda at 8° Tw., to which is added 1 oz. powdered chalk in a gal. This bath is in a cistern fitted with rollers at top and bottom, and heated to 90° F. (32° C). The pieces pass through this solution at the speed of 25 yd. a minute. They are then rinsed in a tank of cold water, fitted with a reel about 4 ft. above the surface. By this process, the indigotine attached to the fibre is rendered blue, if the green mixture has been printed the one pieces are next passed into a chrome beck at 100° F. (38° C), containing 1 oz. bichromate of potash in a gal. of water. Here the pieces remain for 5 minutes, and are then washed.
They are next submitted to second dunging (the passage through silicate of soda being the fly-dunging) for 15 minutes, at 100° F. (38° C), in a beck of cow-dung and water. They are next washed in water, and dyed with madder, mun-jeet, flower of madder (alizarine), garancine, cochineal, or mixtures of garancine with sumach and bark. The grounds are then cleared in the ordinary manner, preferably with chloride of lime.
25 lb. dark British gum, 15 lb. water. Boil for 10 minutes; and add 7 1/2 lb. soft-soap. When thoroughly incorporate!, add 20 lb. sulphate of zinc. Stir in wall, and add further: - 7 1/2 pints water. 10 lb. pipe-clay, 7 1/2 gal. nitrate of copper at 80° Tw. Work all thoroughly together.
Heat 2 lb. water to a boil, and add, with constant stirring, 1 lb. sugar of lead, and 1/2 lb. litharge; boil for 20 minutes, and add to the liquid, to which more water must be supplied, to compensate for the loss by evaporation, 1 lb. blue-stone, 2 lb. nitrate of lead, and l 1/2 oz. verdigris, previously softened in acetic acid. The whole is let stand for a day, with frequent stirring; 1 1/4 lb. powdered gum Senegal, and 1 lb. sulphate of lead, are then stirred in; and lastly, 2 1/2 oz. powdered sal ammoniac, and 1 oz. lard are added. If the colour is too stiff, it is diluted with water.' It is then strained, and printed on at about 122° F. (50° C). Age for a day or two at 66° to 77° F. (19° to 25° C.). Dye in the cold vat; dry, and sour at 3/4° Tw. For raising the orange, take for 100 yd., 175 pints water, containing 8 lb. chromate of potash, and 16 lb. lime. Let settle; run off the clear, and heat to aboil, at which temperature the pieces are passed through at such a speed that each part may occupy 3 minutes in traversing the liquid.
20 lb. blue-stone, 2 gal. water, 20 lb. nitrate of lead. Dissolve; and thicken with 12 lb. flour, 2 gal, sulphate of lead pulp. Boil well together. The sulphate of lead pulp here mentioned is the sediment left on making red liquor with solution of sugar of lead and alum (or sulphate of alumina), after the liquid has been run off.
To produce a pale-blue pattern on a deep-blue ground, the entire pieces are first dyed a light shade in the vat. They are then withdrawn, thoroughly washed in water, taken through vitriol .sours at 2° Tw, washed again, squeezed, and dried. One of the white reserves is then printed on, and the pieces are returned to the vat, and dyed the darker shade. The reserved parts appear as a pale-blue pattern on a deep-blue ground.
To obtain a design in two blues on a white, muriate of manganese is printed on, thickened with dark British gum, and is then peroxidized by being passed through chloride of lime and soda, as in the production of "bronzes." The goods are then dried, and those parts of the pattern which are to appear white are printed with a white reserve. The goods are next limed, vatted to shade, taken out, aire I to oxidize the indigo, washed, and rinsed in weak muriate sours, to which a little protochloride of tin has been added. The pattern appears then in white and dark-blue on a light-blue ground, the white being where the discharge was applied, and the dark-blue where the indigo is fixed upon a bottom of manganese brown.
If yellow or orange is to be obtained in addition, the yellow or the orange reserve is blocked in beside the muriate of manganese and the white reserve. Vitriol sours must be used here, and the yellow is then developed by a passage through bichromate of potash at 100° F. (38° C), containing 2 oz. per gal. Wash in water, and pass through muriate sours at 1/2° Tw., with the addition of 1 oz. oxalic acid per gal.
If a blue and green design is intended, the yellow discharge given, or one of a similar character, is printed on, and the goods are dipped in the* vat to a full blue, washed, aired, washed again, taken through vitriol sours at 2° Tw., washed again, and passed through the bichromate beck, but without any treatment in oxalic-muriatic sours. The green is formed by the combination of the yellow and the blue.
To produce two shades of the blue with a green, the cloth is vatted to a pale-blue, a white reserve for light shades, and an orange reserve, are printed in. The usual operations are then gone through; but after the bichromate process, the pieces are taken through nitric acid, which must be very dilute, otherwise the indigo may be destroyed. The result is a dark-blue ground, with a design in pale-blue where the white resists have been applied, and in green where the orange has been printed.