FIELD: food industry.
SUBSTANCE: invention relates to application of three-layered polymer film permeable for carbon dioxide and slightly impermeable for oxygen and representing package material for liquid or semi-liquid gas-emitting products.
EFFECT: in process of polymer film strengthening with a uniformly perforated second film a material is generated which is fit for manufacture of a package for storage of liquid or semi-liquid products containing yeast, for instance, yeast in the form of cream.
51 cl, 4 tbl
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