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Your cart is empty.Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. Qualitative analysis, low ash content 0.06 percent, untreated, consistent performance, wet-strengthened grades, custom cut. These grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet. The inherent strength of standard (untreated) grades does not pose a problem when they are used in routine quadrant folded applications. We do not recommend these grades for use in vacuum work or when wet handling is required. Ahlstrom 617 is also found in construction product testing and is used by students to retain large flocculents and precipitates.
Douglas D Hanson
Reviewed in the United States on October 3, 2012
I bought this paper to filter my various chemical solutions that are required for Wet Collodion Photography. The filters fold nicely into my funnels and do a good job of trapping very fine particulant matter. Fast flow is relative (or I guess their may be a specification for this). The flow is not that fast as when I was using several coffee filters, but this product does a much better job. The quantity of filters in the box is much more than 17, that part I don't get.
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