Origin of gelatin
The main sources of gelatin are animal bones, skins and fish scales. Generally speaking, the bones and skins of cattle, pigs, chickens and other animals are the main sources of gelatin. The bones and skin of these animals contain a lot of collagen, which can be processed into gelatin.
Use of gelatin
Gelatin is widely used in food, medicine, cosmetics, photography, printing and other industries. In the food industry, gelatin can be used to make jelly, candy, biscuits, meat products and so on. In pharmaceutical industry, gelatin can be used to make capsules, tablets and so on. In the cosmetics industry, gelatin can be used to make masks, lotions, shampoos, etc. In the photography industry, gelatin can be used to make films. In the printing industry, gelatin can be used to make offset printing plates.
Preparation method of gelatin
The preparation method of gelatin is relatively simple, and the specific steps are as follows:
1. Choose raw materials, usually animal bones, skins, fish scales, etc.
2. Clean the raw materials and remove impurities.
3. Cut the raw materials into small pieces or fragments, and then soak them in water for several hours to several days to soften them.
4. Put the softened raw materials into the pot, add enough water, and cook slowly over low heat.
5. After boiling, turn to low heat and continue to cook for several hours to dozens of hours until the raw materials are completely dissolved.
6. Filter the dissolved liquid to remove impurities and residues.
7. Let the filtered liquid cool and wait for it to solidify into a gelatinous substance.