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In recent years there has been an increasing concern about the huge amount of plastic waste generated in daily life. In order to reduce the impact of petroleum-derived plastics, transparent and colorless fish gelatin films were prepared by solution casting. The effect of solution pH on film structure and consequently on mechanical, barrier, and optical properties was analyzed. Results showed that films prepared at basic conditions were hydrophobic and presented high light barrier and high tensile strength. Furthermore, environmental assessment demonstrated that composting as end of life scenario provided an environmental benefit in all the impact categories, highlighting the potential of these films as alternative raw materials to manufacture sustainable products.

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