How do you produce gelatine?

                  To produce gelatine, first raw materials, which are bones, connectives tissues and organs of pork or ox, are treated. The flat is cut off and « demineralised ». Then, for the pork, you have to apply an acid process: tissues are treated in an acid bath for about one day and then, before the collagen is extracted, they are washed: gelatine which is obtained is a type A gelatine. But for ox, skins and bones macerate in a whitewash for a few weeks: gelatine we obtain is one of type B. This stage aims to change the structure of the collagen, to make it soluble in boiling water.
Then there is the extraction, the product obtained is mixed with hot water.
Next, there is the filtration, the extracted solutions are cleared off of all traces of fat and fibril. Then the calcium, the sodium, the acid residues and other salts are eliminated . The next stage consists of putting the gelatine into an evaporator to give it a viscous texture.
In the last stage, solutions of gelatine are sterilized, cooled down and solidified. The product obtained is dried at the air and the gelatine is grinded and crushed to obtain different grading.



                    But there is a difference between the gelatine of type A and the gelatine of type B. The one type A, produced from bones and rinds of pork has an iso-electric point in excess of 6,5, while the one type B, produced from bones and skin of bovine has only an iso-electric point of about 5. Their level of viscosity can be compared, too, because the gelatine of type A has a viscosity inferior to the one of type B with a same level of bloom.


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