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Cambridge Brand Qualitative Filter Paper: Grade 3 Circles
DescriptionStandard qualitative filter papers are suitable for quadrant folded or gravity flow applications. These
grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet.
The inherent strength of standard (untreated) grades does not pose a problem when they are used in
routine quadrant folded applications. We do not recommend these grades for use in vacuum work or
when wet handling is required.
This high absorbency grade is twice as thick as grade 2 with similar particle retention. The superior absorbency offers excellent performance when used as a sample carrier. The extra thickness gives higher wet strength and loading capacity, enabling more precipitate to be held without clogging the filter. Grade 3 is also highly suitable for use in
Buchner funnels and for dye filtration.