Application of native gelatin has definite restrictions determined by the required gelation rate, thermal stability, and rheological properties. So, it is necessary to modify gelatin as a gelator.
This issue is answered by combination of gelatin with other
component. For instance, gelatin can be modified by using some
chemical cross-linking agents such as chloranhydride or formaldehyde (De Carvalho&Grosso, 2004). They are effective modifiers but not acceptable in food industry. Other method consists in
addition of surfactants or biopolymers compatible with gelatin.