DYEING AND CALICO PRINTING.

57 *

No. 43. Red, Resist, Garancin (Machine ).—-

Red liquor, at 18 0 Tw. 2 gals.

Starch . 2l lbs.

Peachwood liquor . 1 gill.

Boil, and when cool add—-

Tin crystals. \ lb.

Used for resisting light chocolate “covers.” (See also pp. 287, 288, and 289.)Mordants, Discharges, Reserves, Covers, &c.

No. 44. Alkaline Red Mordant.—

Alum (not ammoniacal). 10 lbs.

Boiling water . 5 gals.

Dissolve and add—

Caustic soda-lye, at 70° Tw. f gal.

Add cold water to make up 12 gals., allow the precipitate to settle, and washby decantation till the washings are tasteless. Filter, remove the precipitatefrom the filter, and dissolve it in 5 pints caustic soda-lye, at 70° Tw. Boil,make up to 3 gals., add 9 lbs. of dark gum substitute, and boil again.

No. 45. Light Red Alkaline Mordant .—

No. 44 . 1 gal.

Dark gum-substitute water. g lbs.

No. 46. Alkaline Pink Mordant .—

Caustic potash-lye, at 54° Tw.40 gals.

Sulphate of alumina (patent- or cake-alum) . . .. 140 lbs.

The lye is heated in an iron boiler, and the sulphate of alumina added bydegrees, with frequent stirring. The yield is about 45 gals., at 34° Tw. It is

thickened with dark gum-substitute.

No. 47. Alkaline Light Pink Mordant. —

Caustic potash-lye, at 41 0 Tw.25 gals.

Alum (potash).go lbs.

Dissolve in the same manner as above. (See also p. 278.)

No. 48. “ Acid ” (Lime-juice Mixture ).—

Lime-juice, at 8° to 10° Tw. 1 gal.

Starch . 1 lb.

Boil, and stir till dissolved.

No. 49. “ Acid.” —

Lime-juice, at 20° Tw. 1 gal.

Starch . 1 lb.

No. 50. “ Acid .”—

Lime-juice, at 30° Tw. 1 gal.

Starch . 1 lb.

These acids are sometimes thickened with gum-substitute.

No. 51. Acid Discharge. —

Lime-juice, at 22° Tw. 1 gal.

Bisulphate of potash . 1 lb.

The clear liquor is run off from the sediment, filtered, and thickened with 1 lb.starch.

No. 52. Acid Discharge.—

Lime-juice, at 28° Tw. 1 gal.

Bisulphate of potash . 2 lbs.