Qualitative Filter Papers-Grade 6: 3μm

Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed).

More absorbent than Grade 1. In addition to general filtration in the 8 μm particle size range, the extra absorbency is utilized, for example, to hold soil nutrient in plant growth trials.

Also used for monitoring specific contaminants in the atmosphere and in soil testing.

Grade 93: 10 μm*
This filter paper is intermediate in speed and retention between Grades 1 and 4.

Available in a dispenser pack, which can be attached to the wall or bench, placed on a
shelf either upright or flat, and used as a normal carton or as a convenient dispenser.

The envelopes are released individually for easy one-at-a-time removal.

Package and envelopes are clearly marked for size and content.