Qualitative Filter Papers-Grade 6: 3μm

Grade 41: 20 μm*
The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g. iron or aluminum hydroxides).

Also used in quantitative air pollution analysis as a paper tape for impregnation when
determining gaseous compounds at high flow rates.

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.