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Filtration properties of a new two-sided irradiated membrane with a thickness of 20 µm (exceeding the range of the incident ion), a pore diameter of 0.20 µm, and a pore density of 1.5 × 108 cm−2 have been studied in comparison with a one-sided irradiated 12-µm membrane having the same pore size and a somewhat higher pore density of 2.3 × 108 cm−2. An aqueous dispersion of a dye with a stable particle...