Hardened Low Ash Grade
GE Healthcare offers three grades of hardened low ash quantitative cellulose filter papers, giving you access to a choice of filtration speeds and particle retentions. They are available in different filter sizes, from small circle formats to large size sheets. We can also make custom-sized filters to meet your specific needs. Whatman hardened low ash quantitative filter papers are acid-treated to remove trace metals and to produce high wet strength and chemical resistance. They are particularly suitable for Büchner filtration, where the tough, smooth surface of the filter makes it easy to recover precipitates.