| 摘要 |
<p>A process is described for producing, from fish collagen, a type B gelatin having a pl in the range of from 4.5 to 6.0, which process comprises: (a) treating fish skins with an alkaline medium to provide a mixture thereof having a pH of at least (12); (b) acidifying, using a mineral acid, the mixture produced in step (a) to a pH of less than (7); and (c) acid-extracting the gelatin thereby produced; and, optionally, (d) further processing the extracted gelatin produced in step (c). The gelatin prepared by or preparable by the improved process of this invention can be used in the manufacture of capsules, especially soft capsules, for food and/or pharmaceutical applications. It can also be used in the preparation of a composition for photographic applications.</p> |
