9.0 cm Filter Paper, Qualitative 35 micron – Fast, Pk/50

This is an extremely fast filtering grade with a large particle retention. The Ahlstrom 617 is a thick filter paper with high loading capacity. It is used for rapid filtration of coarse particles and gelatinous precipitates such as in oils and resin solutions. Ahlstrom 617 is also found in construction product testing and is used by students to retain large flocculents and precipitates.