FIELD: chemically active medium purification. SUBSTANCE: polypropylene film is irradiated by heavy charged particles, then chemical etching in solution, that has hexavalent chrome compound, is exercised, washed by water and subjected to treatment under temperature of 80 90 C in water 2 3 solution of hydrogen peroxide. In separate cases solution additionally has 1 2 g/l of sodium hydroxide or 2.5 3.5 g/l of pyrophosphate. EFFECT: microfiltration membrane production method is used for purification of chemically active medium. 1 dwg, 1 tbl
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