Collodion, Elas′tic. Prep. 1. (Lauras.) Heat together Venice turpentine, 2 parts; castor oil, 2 parts; and white wax, 2 parts; add sulphuric ether, 6 parts; and mix all with the product of No. 3 (above), that is, to the collodion formed with 8 parts of prepared cotton, 125 ether, and 8 alcohol.
2. (C. S. Rand.) Dissolve prepared cotton (No. 5, above), 2 dr., in sulphuric ether, 5 fl. oz.; then add, Venice turpentine, 2 dr., and complete the solution by slight agitation.
Obs. The collodion made by either of the above processes, when applied to the skin, forms a transparent pellicle, more pliable and more difficult to remove than that of ordinary collodion.
Collodion, Flexible. Collodion Flexile. (B. P.) Mix collodion (B. P.), 6 fl. oz., with Canada balsam, 120 gr.; and castor oil, 1 fl. dr., and keep in a well-corked bottle.
Collodion, Hemostatic. Collodion, 10 parts; carbolic acid, 1 part; tannic acid, 1⁄2 part; benzoic acid, 1⁄2 part; all by weight. To be applied with a pencil brush.
Collodion, Iodised. This may be made at one operation; it should be kept two days before being used, but is less reliable if kept for any length of time than the sensitised collodion described below. It is made as follows:—Place 16 grains of gun-cotton in a bottle, add 18 grains of iodide of cadmium in powder, 6 grains of bromide of cadmium in powder, and 11⁄2 oz. of spirits of wine (sp. gr. 0·805). Shake the bottle until the iodide and bromide are dissolved, then add 3 oz. of ether, sp. gr. 0·720, and shake until the cotton is dissolved. After settling for twenty-four hours, decant the clear portion into small well-stoppered bottles.
Collodion, Med′icated. It has been proposed to medicate collodion in several ways, but the practice has not found much favour with the medical profession. The following preparations have been described:—
Collodion, Aconite. From aconite root, by a similar formula to that of Belladonna c. (below).
Collodion, Belladonna. Prep. Macerate select belladonna leaves, powdered, 8 oz., in ether, 12 fl. oz., with alcohol (95%), 4 fl. oz., for six hours. Pack in a percolator, and pour en alcohol till a pint of tincture is obtained; in this dissolve pyroxylin (gun-cotton), 1 dr., and Canada balsam, 1⁄2 oz. Used as a substitute for BELLADONNA PLASTER.
Collodion, Cantharidin. See Collodion, Vesicating.