Plaster of Car′bonate of Lead. Syn. Emplastrum plumbi carbonatis, E. cerussæ, L. Prep. (P. Cod.) Carbonate of lead, 1 lb.; olive oil and water, of each 2 lbs.; boil them together until they combine and form a plaster; lastly, remelt this with white wax, 31⁄2 oz. Its properties resemble those of ordinary lead plaster. An excellent emollient and defensive plaster. See Plaster, Mahy’s.
Plaster, Cephal′ic. Syn. Labdanum plaster; Emplastrum cephalicum, E. labdani, L. Prep. (Ph. L. 1788.) Labdanum, 3 oz.; frankincense (thus), 1 oz.; melt, and add to the mixture, when nearly cold, powdered cinnamon and expressed oil of mace, of each 1⁄2 oz.; oil of mint, 1 dr. Applied to the forehead or temples, in headache; to the stomach, in colds, &c. See Plaster of Burgundy pitch,
&c.
Plaster, Cheselden’s Stick′ing. Syn. Emplastrum plumbi cum pice, L. Prep. From lead plaster, 2 lbs.; Burgundy pitch (genuine), 1 oz.; melted together.
Plaster, Corn. Syn. Emplastrum ad clavos, L. Prep. 1. Resin plaster, 5 parts; melt, stir in of sal ammoniac (in fine powder), 1 part, and at once spread it on linen or soft leather.
2. (Kennedy’s.) From beeswax, 1 lb.; Venice turpentine, 5 oz.; verdigris (in fine powder), 11⁄2 oz.; mixed by a gentle heat, and spread on cloth. It is cut into pieces, and polished, and of these 1 dozen are put into each box.
3. (Le Foret.) Galbanum plaster, 2 oz.; melt by a very gentle heat; add, sal ammoniac and saffron, of each 1⁄2 oz.; powdered camphor, 2 oz.; and, when nearly cold stir in of liquor of ammonia, 2 oz. Applied, spread on leather, to the corn only, as it will blister the thinner skin surrounding its base.
4. (Ph. Sax.) Galbanum plaster, 1 oz.; pitch, 1⁄2 oz.; lead plaster, 2 dr.; melt them together, and add verdigris and sal ammoniac (in fine powder), of each 1 dr. For other formulæ, see Plaster of Verdigris (below), and Corns.
Plaster, Court. Syn. Sticking plaster, Isinglass p.; Emplastrum ichthyocollæ, E. adhesivum anglicum, L. Prep. 1. Isinglass, 1 part; water, 10 parts; dissolve, strain the solution, and gradually add to it of tincture of benzoin, 2 parts; apply this mixture, gently warmed, by means of a camel-hair brush, to the surface of silk or sarcenet, stretched on a frame, and allow each coating to dry before applying the next one, the application being repeated as often as necessary; lastly, give the prepared surface a coating of tincture of benzoin or tincture of balsam of Peru. Some manufacturers apply this to the unprepared side of the plaster, and others add to the tincture a few drops of essence of ambergris or essence of musk.
2. (Deschamps.) A piece of fine muslin, linen, or silk is fastened to a flat board, and a thin coating of smooth, strained flour paste is given to it; over this, when dry, two coats of colourless gelatin, made into size with water, q. s., are applied warm. Said to be superior to the ordinary court plaster.