APPENDIX. 6g 3

from iron. The conta<S of iron must be avoided all through the process, or

the colour will become a drab.

Dark Shade for two Mauves, or 20 W. Mauve .—

Gum Senegal water (10 lbs. per gallon). 4 gal.

Water. 4 „

Tannic acid (pure) .20 ozs.

Light Shade for two Mauves, or 3 W. Mauve .—

Gum-water . 4 gab

Water . •• . 4 ,,

Tannic acid.3 ozs.

Dark Shade for three Mauves, or 24 W. Mauve .—-

Gum-water . 4 gal.

Water .1 „

Tannic acid. 24 ozs.

Medium Shade for three Mauves, or 10 W. Mauve .—

Gum-water . 4 gal.

Water . 1 „

Tannic acid.10 ozs.

The colour for covers is 2, 24, or 3 ozs. per gallon of gum-water.

Dissolve the tannin in the water, and add to the gum-water. Sighten thedark shades with a little ground indigo, and the light ones with a little mauveor magenta. After printing age one night, or run the goods through theageing-machine and let lie one night. Steam forty-five minutes, at 1 lb.pressure to the square inch. The goods are then ready for fixing. For thefixing process a wooden beck is divided into two parts : the first part is linedwith lead, and contains a closed leaden steam-coil to heat the fixing liquor; atthe end of each division is a pair of weighted rollers, to squeeze back as muchas possible of the liquid : the second part of the beck contains cold water forrinsing. The first part of the beck is made up as follows :—

Water . 1 gal.

Tartar emetic. 2 ozs.

Glue. 4 oz.

The beck is filled three-fourths with this liquor, and heated from 170° to190° F. Lower temperatures must be carefully avoided. The pieces travelthrough this liquid in three-quarters of a minute. The goods are well washed,and are then ready for dyeing.

For dyeing twenty pieces, 9/8, 25 yards each, put sufficient water in thebeck, enter the pieces, raise the temperature to 120° F., add one quart of aceticacid at 8° Tw., and 20 ozs. of mauve paste, previously dissolved in 1 quartmethylated spirit. Raise the temperature to a boil in seventy-five minutes,and boil fifteen to twenty minutes. Without the final boiling the whites willbe soiled and the colours flat. Wash well, and dry. To clean the whitespass open through chloride of lime,—1 quart at io° Tw., mixed with 18 gals,of water. Put in a beck containing 5 lbs. soap to 500 to 600 gals, water, andboil for eight to ten minutes ; wash well, and finish.

For magentas the mordant and subsequent treatment are the same, and thegoods are dyed up as follows ;—For twenty pieces, g/8, 23 yards, enter the