Cement, Cop′persmiths’. Syn. Blood cement. From bullock’s blood thickened with finely powdered quick-lime. Used to secure the edges and rivets of copper boilers, to mend leaks from joints, &c. It must be used as soon as mixed, as it rapidly gets hard. It is cheap and durable, and is suited for many other purposes.
Cement, Curd. Prep. 1. The curd of skimmed milk (obtained by the addition of vinegar or rennet) is beaten to a paste with quick-lime, in fine powder.
2. Add vinegar, 1⁄2 pint, to skimmed milk, 1⁄2
pint; mix the curd with the whites of 5 eggs; well beaten and powdered quick-lime, q. s. to form a paste. Used for mending glass and earthenware; they resist water and a moderate degree of heat.
3. Rub from two to four parts of the curd, with a cold solution of borax, till a thick liquid is obtained, that becomes clear on standing. This is an excellent cement for artificial meerschaums, and may be used to give consistency to silk goods, or to coat artificial flowers, and court plaster, to the latter of which it imparts more adhesiveness and firmness.
Cement, Cut′lers’. Prep. 1. Black resin, 4 lbs.; beeswax, 1 lb.; melt, and add finely powdered and well-dried brickdust, 1 lb.; mix well.
2. Equal weights of resin and brickdust, melted together.
Use. To fix knives and forks in their handles. It is put into the hollow of the handle, and the metal, previously made hot enough to melt the composition, pressed into its place whilst warm, and the whole kept upright and still until quite cold.
Cement, Di′amond. See Cement, Armenian.
Cement, Egg. White of egg thickened with finely powdered quick-lime. Used to mend earthenware, glass, china, marble, alabaster, spar ornaments, &c. It does not resist long exposure to moisture unless it has been exposed to heat.