WHATMAN Grade 50 Quantitative Filter Paper, Hardened Low Ash

Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers with a slow flow rate, these filters have a hardened and highly glazed surface,
which also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Büchner or 3-piece filter funnels. Very strong when wet and will withstand wet handling and precipitate removal by scraping. In the electronics industry, the virtual absence of fiber shedding is utilized in carriers for integrated circuits. This grade is also available in Smear Tab format for wipe testing (e.g. testing of surfaces for radionuclide contamination).