After absorbing water and swelling, it is dissolved by indirect heating, and the sol cannot be heated directly. The temperature of the sol is controlled at about 75℃, and it can be used without adding water. The dosage of edible gelatin in fruit cake is 5%- 10%.
Edible gelatin can be used in medical soft capsules and hard capsules, surgical dressings, hemostatic sponges, aspic, food additives, canned food, candy, sorbet, ham sausage, jelly, soda suspension, inspection agent, sediment, ice cream and other food industries. , implement the national standard GB6783-94.
preparation method
1, preparation method of alkali
Animal bones and skins are fully soaked in lime milk, neutralized with hydrochloric acid, washed with water, boiled at 60 ~ 70℃, then preserved, bleached, frozen, sliced and dried. The finished product is called "type B gelatin" or "alkaline gelatin".
2. Preparation method of acid
Raw materials are acidified in cold sulfuric acid solution with pH value of 1 ~ 3 for 2-8 hours, soaked in water for 24 hours after rinsing, boiled at 50-70℃ for 4-8 hours, then frozen, extruded and dried. The finished product is called "type A gelatin" or "acidic gelatin".