2289. Good Liquid Glue

2289.    Good Liquid Glue. Fill a glass jar with broken-up glue of best quality, then fill it with acetic acid. Keep it in hot water for a few hours, until the glue is all melted, and you will have an excellent glue always ready.

2290. Glue which Stands Moisture Without Softening

2290.    Glue which Stands Moisture Without Softening. Dissolve, in about 8 fluid ounces of strong methylated spirit, 1/2 an ounce each of sandarac and inastich; next, add 1/2 an ounce of turpentine. This solution is then added to a hot, thick solution of glue to which isinglass has been added, and is next filtered, while hot, through cloth or a good sieve. (See No.2280.)

2291. Marine or Waterproof Glue

2291.    Marine or Waterproof Glue. Take of gum shellac 3 parts, caoutchouc (India-rubber), 1 part, by weight. Dissolve the caoutchouc and shellac in separate vessels, in ether free from alcohol (see No. 2248 (To Dissolve India Rubber for Cement, etc.)), applying a gentle heat. When thoroughly dissolved, mix the two solutions, and keep in a bottle tightly stoppered. This glue resists the action of water, both hot and cold, and most of the acids and alkalies. Pieces of wood, leather or other substances, joined together by it, will part at any other point than at the joint thus made. If the glue be thinned by the admixture of ether, and applied as a varnish to leather, along the seams where it is sewed together, it renders the joint or seam water-tight, and almost impossible to separate.

2292. Isinglass Glue

2292.     Isinglass Glue. Dissolve isinglass in water and strain through coarse linen, and then add a little spirits of wine. Evaporate it to such a consistency that when cold it will be dry and hard. This will hold stronger than common glue, and is much preferred.

2293. India-Rubber Glue for Photographers and Bookbinders

2293.    India-Rubber Glue for Photographers and Bookbinders. A most valuable glue for photographers, and extensively used by first-class bookbinders, is made from bottle India rubber. This must be dissolved in highly rectified spirits of turpentine; the highly rectified spirit extracts every particle of grease, which is of the greatest consequence.

2294. Braconnot's Glue of Caseine

2294.    Braconnot's Glue of Caseine. Dissolve caseine in a strong solution of bicarbonate of soda.

2295. Wagner's Glue of Caseine

2295. Wagner's Glue of Caseine. Dissolve caseine in a cold saturated solution of borax. Superior to gum, and may take the place of glue in many cases. May be used for the backs of adhesive tickets.

2296. To Glue a Joint

2296. To Glue a Joint. In general, nothing more is necessary to glue a joint, after the joint is made perfectly straight, than to glue both edges while the glue is quite hot, and rub them lengthwise until it has nearly set. When the wood is spongy, or sucks up the glue, another method must be adopted - one which strengthens the joint, while it does away with the necessity of using the glue too thick, which should always be avoided; for the less glue there is in contact with the joints, provided they touch, the better; and when the glue is thick, it chills quickly, and cannot be well rubbed out from between the joints. The method to which we refer is, to rub the joints on the edge with a piece of soft chalk, and, wiping it so as to take off any lumps, glue it in the usual manner; and it will be found, when the wood is porous, to hold much faster than if used without chalking.