6 4 8

DYEING AND CALICO PRINTING.

with other colours. It is obtained as follows:—For the red a mordant is usedcomposed of red liquor, at 12° Tw., thickened with 2j lbs. of flour per gallon.Cool, and add per gallon 4 ozs. of muriate of tin crystals.

For the orange :—

Nitrate of lead. 4$ lbs.

White sugar of lead. 4J „

Water. ^ gal.

Dissolve, and add—

Gum Barbary, 6 lbs. per gallon . J gal.

For the black:—

Sulphide of copper paste .. .. 1 gill ( i.e . J pt.)

Colour as below. 1 gal.

Mix just before printing.

To make the chlorate of ammonia:—

Tartaric acid. 7} lbs.

Boiling water . 6 gals.

Dissolve, and add gradually—

Sesquicarbonate of ammonia. 3 lbs. 2 ozs.

Mix gradually, and add—

Chlorate of potash . 8 lbs.

Dissolve, and stir for ten minutes. Let stand till cold, and filter. Wash theprecipitated tartar with 6 quarts of cold water. This should yield 6 •gallonsof clear chlorate of ammonia liquor.

To make the colour above referred to thicken this with British gum, 36 lbs.(or a mixture of British gum and starch). Heat to 150° F., let stand till cold,

and add—

Aniline oil . 4 quarts.

Best muriatic acid (34° Tw.). 3 „

Mix well together.

F'or the sulphide of copper :—

Flowers of sulphur . 2 lbs. 2 ozs.

Caustic soda (70° Tw.) . 11J ,,

Stir well till dissolved without heat, and add it to—

Sulphate of copper . 10 lbs.

Dissolved in—

Boiling water .20 gals.

Wash till neutral to test-paper, and filter till the bulk of the pulp is reducedto 1 gallon. Print, and hang in a room at 70° F'., with about 8 or 9 degreesof difference between the wet- and dry-bulb thermometers. Age till black,and pass through ammonia-gas. Hang in a cool room for a few hours, andthen pass through the following solution at 160° F.:—

Sulphate of soda. 2 lbs.

Phosphate of soda . 1 oz.

Water. 1 gal.