Filter paper retains the finest particles, but is a “fast“ filter with superior loading capacity. Practical for chemical analysis of water and waste samples. Grade 934-AH is produced to give superior performance in filtration of extremely fine precipitates, e.g., bacteria such as E. coli (rod-like, 0.5 x 1.0 µm). Has been used for harvesting lymphocytes during incorporation trials and for mixed lymphocyte culture tests. Comes packed interleaved with a rapid filtering cellulose paper which is used with Grade 934-AH and downstream of it to prevent extremely fine fibers from shedding into the filtrate. (For cost savings, see Ahlstrom equivalent, 462-200-02 Series)