Alginic acids sulfate, gelatinization

Tridecylbenzenesulfonic acid, potassium lauryl sulfate, potassium myristate, potassium laurate Titanium oxide, benzophenones, PABA and derivatives, methoxycinnamates, salicylates Polyacrylic acid, methylcellulose, zinc laurate, tin oxide, gelatin, paraffin, agar, alginate, betaine... 

The natural materials are often derived from skin such as, for example, collagen, gelatin, fibrin, hyaluronic acid, chondroitin sulfate and also acellular dermis from cadaveric skin origin. But materials from other origins are also widely used, such as bacterial polyesters (Valappil et al., 2007), cellulose (Teeri et al., 2007), chitosan, alginate, dextran, etc. A lot of constructs based on natural products can be found in different forms such as membrane, plate, sheet, fiber, sponge, and hydrogel. 

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