Plaster, Prestat’s Adhe′sive. Prep. From lead plaster, 21⁄2 lbs.; yellow resin, 5 oz.; Venice turpentine, 4 oz.; gum ammoniacum and mastic, of each 11⁄4 oz.; made into a plaster, and spread on linen or calico.
Plaster of Red Lead. See Plaster of Minium.
Plaster of Res′in. Syn. Adhesive plaster, Resinous p.; Emplastrum adhesivum, E. resinæ (B. P., Ph. L. & D.), E. resinosum (Ph. E.), E. lythargyri cum resinâ, L. Prep. 1. (Ph. L.) To lead plaster, 3 lbs., melted by a gentle heat, add of resin, 1⁄2 lb., also liquefied by heat, and mix. The formula of the Ph. U. S. is similar.
2. (Ph. E.) Litharge plaster, 5 oz.; resin, 1 oz.; mix with a moderate heat.
3. (Ph. D.) To litharge plaster, 2 lbs., melted by a gentle heat, add, of powdered resin, 4 oz., Castile soap, in powder, 2 oz., and mix them intimately.
4. (Wholesale.) Pale lead plaster (from a previous batch, and quite dry), 72 lbs.; olive oil (Genoa), 3 lbs.; melt them together in a bright and perfectly clean copper pan, and sift in of pale yellow resin (in powder), 12 lbs., stirring all the while. The mixture is to be cooled, and ‘pulled’ or ‘worked,’ after the manner of lead plaster.
5. (B. P.) Resin (in powder), 2; litharge plaster, 16; hard soap, 1; melt the plaster with a gentle heat, add the resin and soap, first liquefied, and mix.
Obs. Resin plaster, spread upon calico, forms the well-known ‘STRAPPING’ or ‘ADHESIVE PLASTER’ so extensively used to protect raw surfaces, support parts, and for dressing ulcers, retaining the lips of recent cuts and wounds in contact, &c. It is gently stimulant, and is thought to assist the healing process. It is also employed as a basis for other plasters. The ‘HOSPITAL PLASTER’ of certain houses is of this kind. See Plaster of Soap, Compound.
Plaster, Resol′vent. Syn. Emplastrum resolvens, E. ex mixtis quatuor, L. Prep. (P. Cod.) Galbanum, hemlock, mercurial, and soap plasters, equal parts, melted together.
Plaster, Roper’s Royal Bath. Prep. (Cooley.) Strained black pitch, 16 oz.; Burgundy pitch, 10 oz.; tar and beeswax, of each 1 oz.; melt,