Emplastrum Adhaesivum Elasticum, B.P.C. Rubber Adhesive Plaster.

Format explanation

Related entry: Indiarubber

Indiarubber, masticated, in fine strips 20.31 | 3 ¼ ounces
Wool Fat 53.12 | 8 ½ ounces
Copaiba, by weight 6.25 | 1 ounce
Orris Root, in powder 20.31 | 3 ¼ ounces
Thymol 0.40 | 28 grains
Methyl Salicylate 0.60 | 46 minims
Solvent Mineral Naphtha, a sufficient quantity.

Macerate the indiarubber with six times its weight of solvent mineral naphtha until a homogeneous jelly is obtained. Melt together the wool fat and copaiba, and heat the mixture to 100° for ten minutes. When partly cooled stir in half its weight of the mineral naphtha, then the powdered orris root, previously dried, and the thymol and methyl salicylate. When quite cold add the indiarubber solution and mix thoroughly; strain, if necessary, by forcing through a double layer of gauze or muslin. This plaster should preferably be spread at once, without heat, on suitable material, but if kept for any time before spreading it must be stored in a well-stoppered bottle.

The British Pharmaceutical Codex, 1911, was published by direction of the Council of the Pharmaceutical Society of Great Britain.