These filter papers are used for qualitative analysis. Qualitative filters are made of refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, which gives them a number of diverse filtration properties. The ash content of less than 0,06% is not reduced by post-treatment. Qualitative filter papers are available in sheets, discs and folded filters. 
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Ashless hardened filter paper for qualitative analysis

F1004 GRADE - Very fast filtration icons

F1007 GRADE - Fast filtration icons

F1001 GRADE - Medium filtration icons

F1002 GRADE - Medium-slow filtration icons

F1003 GRADE - Medium-slow filtration (thick) icons

F1006 GRADE - Slow filtration icons

F1005 GRADE - Very slow filtration icons

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