At naked eye,the pure AA film was practically colorless(Fig. 3B) while the one made with NA was slightly yellow(Fig. 3A). Besides the chemical transformation of L6S in LA units,the soaking of seaweeds in alkaline media during AA extraction can also eliminate impurities (salts,floridean starch and others) hence, resulting in light color extracts.These differences in coloration were attenuated for the blended films due to the addition of LBG. All films were very homogeneous and stable upon storage,transparent,easy to handle and resistant when manipulated by hand