Gelatin, without fixed structure and relative molecular weight, is partially degraded by collagen in animal skin, bone, muscle membrane, muscle and other connective tissues and becomes white or pale yellow, translucent, microglossy flakes or powders. Is a colorless, odorless, non-volatile, transparent hard amorphous substance, soluble in hot water, insoluble in cold water, but can slowly absorb water expansion and softening, gelatin can absorb the equivalent of 5-10 times the weight of water. It is a common thickener. Application: Gelatin can be divided into food, photographic and industrial uses. Edible gelatin as a thickening agent is widely used in the food industry to add jelly, food coloring, premium gummies, ice cream, dry cool, yogurt, frozen food, etc. In the chemical industry is mainly used as bonding, emulsification and high-grade cosmetics and other raw materials. Gelatin can also be used as vermicelli to make it stronger.