4 pieces of PLA film
16 6 cmeach were placed into commercial bags of polypropylene
(23 19 cm) yielding a ratio of 1.9 cm2 of film per g of salad, this is
380 cm2 of film. These commercial bags were made of oriented
polypropylene film which has the following characteristics (30 mm
thickness, 1300 cm3 m2 day1 of oxygen transmission rate and
6 g m2 day1 of water vapour transmission rate and antimist
treatment)