Dissolve 8 ounces of sulphate of iron, and as much acetate of lead,
separately in 2 quarts of boiling water; mix well, and settle. Take one
quart of this clear liquor reduced to spec. grav. 1·02, one quart of
mucilage containing 3 pounds of gum, coloured with a little prussiate of
potash, mix into a mordant, and print it on with the cylinder. Two days
afterwards wash in tepid water containing a little chalk, and then pass
the cloth through a solution of prussiate of potash in water, sharpened
with a little muriatic acid, till it takes the desired hue. Finally
rinse.
II. The padding or _plaquage_ style, called _foulard_ also by the
French. See PADDING.
Any mordant whatever, such as the acetates of alumina, or of iron, or
their mixture, may be applied to the piece by the padding machine, after
which it is dried in the HOT-FLUE, washed, dunged, dyed, washed, and
brightened.
Colours from metallic oxides are very elegantly applied by the padding
process. Thus the iron buff, the manganese bronze, and the chrome
yellows and greens are given.