While the water barrier and mechanical properties for the low DS 6-acetylation sample do not show a very significant improvement, higher homologue esters may have a significantly enhanced effect at the same DS values and surface selectivity. This is already indicated in a recent article concerning tensile and wetting properties of regenerated cellulose ester films, from homogeneous modification . Their results indicate that with much lower DS values for the much higher ester homologues, CtA values are even higher than the commercial CA films (DS 2.5) -while elongation of the dry films of the higher homologues can be enhanced significantly (albeit with reduction in stress at break). Another dimension, beyond the barrier and strength properties is the addition of highly novel functionalities that require only a small active component. In these cases, biodegradation most likely is also highly tuneable, yet may still fall under the single use category, under the current (2014) legislation definitions.