In this paper .decolorizing and deodorizing technique by charcoal introduced into the hydrolysis technolo-gy for animal bone glue was studied systematically. The technical characteristics of the hydrolysate from the bone glue were compared with those of the hydrolysate from bone gelation. Proteinaze-papain immobilized and given a trial to the process of gelatin hydrolysis. their biological activities were observed through deter-mining molecalar weight(MW) and distribution(MWD) of the hydrolyzates. The princ...