Granulosa

Granulosa, a dressing material consisting of cellulose, freed from all derivatives, fats, gaseous substances, acetone, acetic acid, resins, etc. Granulosa is prepared from raw cotton subjected to dry distillation in iron retorts at 1000°C; the residue from distillation is impregnated with a weak solution of aluminum ammonium acetate, glycerin, and camphor. After this, the material is dried with a stream of heated air, pressed, and sterilized at 138°C. Granulosa is a black mass, slightly crumbly, odorless, somewhat denser than cotton. Granulosa absorbs water 27 times more than cotton and 17 times more than lignin. Granulosa has epithelializing and hemostatic properties, is bactericidal, and, due to its high hygroscopicity and capillarity, is used for dressings in burns, bedsores, surgical wounds with large amounts of discharge, weeping ulcers, etc. A drawback of Granulosa is its tendency to stain.