PROCESS OF MANUFACTURING FISH GELATIN BY USING TUNA SKIN

摘要

A method for preparing a fish gelatin, and a method for preparing a tuna gelatin are provided to improve the physical properties such as gel strength, gelling point and melting point. A method for preparing a tuna gelatin comprises the steps of preprocessing the washed and pulverized skin of tuna in a 1-3 % acid solution at a temperature of 2-18 deg.C for 01.-4 days; extracting the preprocessed skin of tuna with hot water at a temperature of 40-70 deg.C for 3-8 hours; adding 90-98 % alcohol to the tuna extract until a 75-80 % alcohol treated gelatin solution is obtained; and filtering and drying the tuna gelatin solution. Preferably the alcohol is ethanol.