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QFP - Hardened Low Ash Grade 50

Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface. This finish also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on B├╝chner or 3-piece filter funnels. Very strong when wet. 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).

1450-042 Grade 50 circles, 42.5 mm 100/pk

1450-055 Grade 50 circles, 55 mm 100/pk

1450-070 Grade 50 circles, 70 mm 100/pk

1450-090

1450-110 Grade 50 circles, 110 mm 100/pk

1450-125 Grade 50 circles, 125 mm 100/pk

1450-150 Grade 50 circles, 150 mm 100/pk

1450-185 Grade 50 circles, 185 mm 100/pk

1450-240 Grade 50 circles, 240 mm 100/pk

1450-320 Grade 50 circles, 320 mm 100/pk

1450-500  Grade 50 circles, 500 mm 100/pk

1450-916 Grade 50 sheets, 150 x 230 mm 100/pk

1450-917  Grade 50 sheets, 460 x 570 mm 100/pk

1450-993 Grade 50 sheets, white smear tab 100/pk

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