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Quantitative Hardened Ashless Filter Circles

Whatman® Quantitative Hardened Ashless Filter Circles are the supreme quantitative filter papers featuring high wet strength and chemical resistance. These papers are acid hardened, which reduces ash to an extremely low level. Their tough surfaces make them suitable for a wide range of critical analytical filtration operations. Each grade offers a convenient combination of filtration speed and particle retention. 0.006% ash maximum.

Quantitative Hardened Ashless Filter Circles