Gelatin (Gelatin), without a fixed structure and relative molecular weight, is degraded by the collagen part of the connective tissue such as animal skin, bone, muscle membrane, muscle charm and becomes a white or yellowish, translucent, slightly glossy flakes or powder particles; It is a colorless, odorless, non-volatile, transparent and hard amorphous substance, soluble in hot water, insoluble in cold water, but can slowly absorb water expansion and softening, gelatin can absorb water equivalent to 5-10 times the weight of water.
Gelatin is one of the most important natural biopolymer materials and has been widely used in the food, pharmaceutical and chemical industries.