Scenes of British Wealth: In Produce, Manufactures, and Commerce, for the Amusement and Instruction of Little Tarry At-home Travellers

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J. Harris, St. Paul's Church-Yard, 1825 - Great Britain - 286 pages
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Page 239 - ... are so made into glue. Galls, oak bark and such strong astringents, act upon this jelly called gelatine, and harden and fix it in the skin, which imbibes a gummy substance from the bark, and so forms the whole into leather. 21. The first part of the process of tanning is to steep the skins in water, to wash from them all the blood and dirt ; then the horns, ears, and tail are cut off. They are next to be freed from the hair: this is done by laying them in water with lime for a few days. They...
Page 105 - Papers are dyed of various colors, for the covers of magazines and pamphlets. Marbled paper is very beautiful : the manner of making it is as follows: a trough is provided, of the size of the paper to be marbled ; this is filled with water strongly saturated with gum arable. Different colors are then sprinkled on the surface of this gum water, according to the taste of the operator.
Page 104 - ... about an inch deep, with a bottom of brass wires very closely placed. This is dipped into the vat, and becomes filled with pulp. The water drains away through the interstices of the wires, and leaves a flat thin layer of pulp. The marks of the wires may be seen, if paper is held up to the light. This layer is carefully taken out, and placed on a square of felt, or coarse cloth. Another sheet, and another piece of felt are placed on, and on, till the heap contains six quires, or 144 sheets of...
Page 240 - ... calves' skins are tanned on the same principles ; but do not lie so long in the tan. 24. This process takes many months: but some tanners accomplish the work in a few weeks, by suspending the skins in pits of tan, so that the liquor gets at them more easily than when they lie one upon another. 25. Softer leathers are not imbued with tan ; but the thickening effect is produced by repeatedly soaking them in water, in which salt and alum have been dissolved. 26. The currier's business follows the...

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