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nature : gelatin from animal skin or bone extract derived proteins. A colorless to pale yellow transparent or translucent sheet or silt. Dissolved in water, cooling gel after icy objects. Soluble glycerol and acetic acid, ethanol and insoluble in ether. In dry conditions under long-term storage, and the moist air dried case was very susceptible to bacteria and the role of metamorphism. According to their performance and use can be divided into : (a) Gelatin, the highest quality, usually only used fresh bones, as degreasing solvents or hot water, then diluted hydrochloric acid, to remove bone minerals to be in, and then limewater immersion, and then washing, and the. During and after the bone-in the water heating make glue, glue-time, the best quality, then dried, in photographic gelatin, and the rest for food or industrial use of plastic. (2) consumption of gelatin, does not contain harmful impurities can be used for medicine, food and other industries. (3) Industrial gelatin, the minimum quality requirements for the adhesives industry, such as emulsifiers.
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