PROCESS FOR PREPARING γ-FRACTION OF GELATIN Russian patent published in 1996 - IPC

FIELD: glue-gelatin and photographic industries. SUBSTANCE: to prepare g-fraction of gelatin, collagen-containing raw material includes fish scale, the raw material is macarated with acid, preferably hydrochloric, sulfuric, nitric, acetic or formic at pH of 4.0-5.2 for 12-16 hours, decalcification is carried out with 1.5% solution of hydrochloric or sulfuric or nitric acid for 3-10 minutes and broth is cooked successively at 55 C and 65 C and liquid coefficient of 1:2. EFFECT: more efficient preparation process. 3 cl, 2 dwg