Varnish, Dutch. Lac and toy varnishes are often so called.
Varnish, Etch′ing. See Etching.
Varnish, Fat. See Oil varnish.
Varnish, Flexible. Syn. Balloon varnish, Caoutchouc v., India-rubber v. Prep. 1. From india rubber (cut small), 11⁄2 oz.; chloroform, ether (washed), or bisulphuret of carbon, 1 pint; digest in the cold until solution is complete. Dries as soon as it is laid on. Pure gutta percha may be substituted for india rubber.
2. India rubber, in shavings, 1 oz.; rectified mineral naphtha or benzol. 1 pint; digest at a gentle heat in a closed vessel, and strain. Dries very badly, and never gets perfectly hard.
3. India rubber, 1 oz.; drying oil, 1 quart; dissolve by heat. Very tough; dries in about 48 hours.
4. Linseed oil, 1 gall.; dried white copperas and sugar of lead, of each 3 oz.; litharge, 8 oz.; boil, with constant agitation, until it strings well, then cool slowly, and decant the clear portion. If too thick, thin it down with quick-drying linseed oil. The above are used for balloons, gas bags, &c. See Balloon, Caoutchouc, &c.
Varnish, Furniture. A solution of pure white
wax, 1 part, in rectified oil of turpentine, 4 parts, frequently passes under this name. See Varnishes, Body, Carriage, and Copal, &c.
Varnish, Gilder’s. Prep. (Watin.) Pale gum-lac in grains, gamboge, dragon’s blood, and annotta, of each 121⁄2 oz.; saffron, 31⁄4 oz.; dissolve each resin separately in 5 pints of alcohol of 90%, and make two separate tinctures of the dragon’s blood and annotta, with a like quantity of spirit; then mix the solutions in the proper proportions to produce the required shade. Used for gilded articles, &c.