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Adhesives, Paints, and Varnishes: Dissolve
This is suitable for mending copper boilers, rivets, leaks in copper pipes, faucets, and the like. It is both cheap and durable. - Acid-proof Cement. - Mix in a double boiler 1½ pounds of rosin, 4 ounces of dry red ocher, 2 ounces of plaster of Paris, and 1 ounce of linseed oil. Dissolve with gentle heat. Mix and apply while warm.
Use this for cementing troughs to hold acid. It will stand boiling sulphuric acid.
Parchment Glue. -Boil in a double boiler 1 pound of parchment in 6 quarts of water down to 1 quart.
Strain through cheese cloth to remove the sediment, and with gentle heat evaporate the liquid slowly to the consistency of glue. Bottle and cork tightly for use. Use this for fine work with delicate white paper.
Peach-tree Gum.-The gum which exudes from peach trees, when dissolved in alcohol and thinned with water, is a suitable cement for mending broken glassware, and is a good substitute for gum arabic, senegal, and the like.
To Mend Glass and China. To take off grease or varnish, wash the pieces in ammonia and water, or apply alcohol or ether to the edges to be joined, but take care not to smooth off irregularities, as the rougher the surface the better the cement will hold. When the pieces are numerous it is best to unite them one at a time and let that harden before another is added. Select a quick-drying cement, heat the pieces, apply a thin coating of the cement to both surfaces, no more than will be partially absorbed, and bring the edges together before the cement sets. Hold them firmly until it hardens. After all the pieces have been thus united, let the article stand for several days or weeks before using.
Glue for Gilding. -Cut up rabbit skins as fine as possible, and boil them in water until the liquor on cooling is a firm gelatinous mass.
Dilute with water, bring to a boil, and strain through a wire sieve.
Dissolve 1 part of alum and 3 parts of sulphate of zinc in boiling water, pour into the clear mixture, stir the whole while hot, and strain into a mold until it cools and jells.
The mass will now be thick enough to remove from the mold and dry in the open air or with gentle heat.