The colours employed in this style contain so large a proportion of acid mordants, chiefly the chlorides of tin (or, as they are technically called, " spirits "), that steaming would be impracticable. After printing, the goods are carefully dried, aged for a few hours, rinsed, washed with cold water, and are then ready for drying off. The colours are bright, but, as a rule, not enduring; and the cloth is often weakened by the action of the strong mordants. The colours bear a considerable resemblance to those employed in the steam style. The following are examples: -
1 gal. berry liquor at 80° Tw.,
3 qt. sapan liquor at 8° Tw., 2 qt. logwood liquor at 10° Tw., 1 qt. bark liquor at 13° Tw., 3 lb. starch. Boil; when cooled down to 110° F. (43° C), add further 1 pint oxymtiriate of tin at 100° Tw., 1/2 pint nitrate of copper at 80° Tw., and 1 pint olive oil.
Mix the blue and yellow colours here given, according to shade.
(1) 1 gal. sapan liquor at 14° Tw., 1/2 lb. sal ammoniac, 1 gal. gum water at 6 lb. per gal., 1 pint oxy-muriate of tin at 120° Tw.
4 1/2 gal. sapan liquor at 10° Tw , 9 lb. pink salt (i.e. double chloride of tin and ammonium), 3 lb. sal ammoniac, 2 lb. blue-stone, 5 1/4 oz. oxalic acid, 1 pint water 4 1/2 gal. gum Senegal water (6 lb. per gal.), l 1/8 qt. oxymuriate of tin at 120° Tw.
1 gal. logwood liquor at 8° Tw., 1 gal. water, 10 oz. copperas, 2 lb. starch. Boil, and add 1 pint proto-chloride of iron at 80° Tw., 1 pint oxymuriate of tin at 120° Tw.
-3 gal. sapan liquor at 4° Tw., 1 lb. sal ammoniac, 1 lb. verdigris, 4 1/2 lb. starch. Boil, and add when cold, 5 lb. pink salt, 1 lb. oxalic acid.
1 gal. berry liquor at 10° Tw., 8 oz. alum, 1 lb. starch. Boil, and add 1 pint double muriate of tin at 120° Tw.
Such of the coal-tar colours as can bear the presence of acids, e.g. acid rubine, may, if desired, be applied in spirit styles.