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