Dyes and dyeingPellew, Charles E. (Charles Ernest), Viscount Exmouth
Science
Dyes and dyeing
Pellew, Charles E. (Charles Ernest), Viscount Exmouth
Dyes and dyeing
_Variations in the Process._—Although there are different methods,
the Batik process, as usually meant, is a means of dyeing in which,
before immersing the goods in the dye-pot, the patterns are carefully
drawn in molten beeswax, applied from a little copper cup with a
fine spout called a _tjanting_. Frequently, however, to save time,
the Javanese apply the wax by means of a metal die or block, made by
inserting thin strips of sheet brass in a wooden frame, so that the
edges of the brass form the desired pattern. These blocks, provided
with a handle covered with cloth, are first dipped into the molten
wax, and then the excess is removed by pressing against a pad, which
is kept warm by being near the fire of the melting pot. The pattern
is thus stamped onto the cloth instead of being poured onto it,
through a small spout, out of a cup.
This Batik process is sometimes used by native craftsmen in other
parts of the Far East. Plate I, for instance, shows a specimen of
East Indian work, part of a long piece of stout cotton bought, years
ago, at Liberty’s in London, with an elaborate design made with
molten wax, applied by brush or tjanting. Even in the plate the
characteristic ‘crackle’ shows plainly.
_Wax._—In Java, the wax used for pouring is a mixture of paraffin and
beeswax, or an impure wax imported from Japan for this purpose. For
stamping the patterns it is necessary to use a stiffer wax made from
rosin and paraffin, sometimes mixed with varnish gums.
_Dyes._—The principal colors used are indigo and a beautiful
golden-brown dye made from the bark of the mango tree. The
combination of these gives a black, so that the fine old sarongs
usually contain white, blue, brown, and black. Indigo is dyed first,
and, before dyeing, all the cloth, excepting that which is to come
out blue or black, is carefully covered with the wax. After the
indigo bath (the Javanese use a fermentation vat) the color is set
by oxidation. The old wax is then all washed off with boiling soap
and water, and after drying, the wax is again applied to all parts,
whether white or blue, which are not to receive the brown dye. The
latter is made from a strong, syrupy extract of bark, and is used
without mordanting, the color being set by exposure to air. As
the dyes must be used cold, to avoid melting and obliterating the
pattern, the goods are usually dipped in each dye-bath and exposed,
several times, before reaching the desired shade. After the final
dyeing, the wax is removed by a hot bath of wood ashes or soap, and
the garment is pressed out ready to wear.
When a red color is desired, the natives use a variation of the
old Turkey red process, dyeing with madder or munjeet upon cloth
mordanted with alum and oil. The wax in this case acts as a resist
against the alum mordant, which is applied cold, and thus prevents
the dyestuff, which is applied at the boil, from coloring the cloth
in the protected portions.
Public-domain text, read in full here on John Shaqi.
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