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Grade 1573 ˝ Qualitative Filter Paper Folded (Prepleated), 125 mm Grade 1573 ˝ qualitative filter papers Savings in time required to quadrantfold circles to fit conical filter funnels in repetitive or multiple analyses. Decreased overall filtration time because of the extra surface area exposed; the normal slow down of filtration speed due to the loading of particulate is postponed. Increased total loading capacity as more filter area is available. Maintained flow rate due to the reduction in filter paper contact with funnel side and the selfsupporting shape of the filter itself. The prepleating does not significantly affect any of the technical data, and the same figures may be used for the flat circles. Timesaving Whatman qualitative grades are offered in this convenient form, which gives major advantages over flat circles. A medium fast filter paper with high wet strength. This paper has the same chemical resistance characteristics as Grade 1573. Also available in flat stock form as Grade 1574. Grade 1573 ˝: 1225 µm

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