No 4 (MN-617)

MN 617 (~Wh No 4) Qualitative Filter Papers,  made from the same raw materials as the ashless grades. The average ash content is about 0.1 %, the amount of α-cellulose is about 95 %; Soft, Fast filtration, general purpose filter paper many applications; Thickness 0.2mm; Filtration Speed 9 s; Basic weight 85g/m2; Low ash content (<0.1%); This features fast filtering, with good retention of coarse precipitates such as metal hydroxides and sulphides, or gelatinous substances.

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