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Gelatin is a protein substance that comes from the skins and bones of animals. Most people know it as the substance used to make a jelly like salad or dessert. Not only is it useful in making these foods, but it is also beneficial to the consumer because of its high protein content. Gelatin is also commonly used in the photographic industry and in making medicinal capsules.
The process for producing gelatin is along and complex one. In the processing of gelatin made from bones, which varies slightly from that of gelatin make from skin, the grease first must be eliminated. Then, the bones are soaked in a solution of hydrochloric acid in order to rid them of minerals and are washed several ties in water. Next, the bones are placed in distilled water, heatedtoover90oF for a few hours, placed in fresh distilled water, and then heated againatalittleover100oF. A fluid forms from this heating, and it is concentrated, chilled, and sliced. Finally, it is dried and ground. In its final form, gelatin is white, tasteless, and odorless.