Filtech Grade 423 offers better filtration speed and a higher loading capacity than an analytical filter paper of similar particle retention.

Grade 423 is particularly recommended for pre-filtration of membrane filters and is also used in combination with Filtech Grade 363 as a highly efficient protective and retentive grade density pre-filter for membrane filters.

NOTE: Specifications given are typical values that fall within a defined range. For this reason observed values may vary slightly.