offers a range of wet strengthened
qualitative filters which contain a small quantity of a
chemically stable resin to give improved high wet strength.
This does not introduce any significant impurities into
the filtrate. The resin, however, does contain nitrogen so
these grades should not be used in Kjedldahl estimations,
etc. All wet strengthened grades are available in prepleated
forms. Whatman provides a wide range of qualitative
filters to meet your specific needs.