MUNKTELL filter paper no. 389 Filtration Properties: (White Dot) Medium to Fast filtering, wide pores, Applications: Typical grades for quantitative tasks, coarser precipitates medium wide pores such as lead-, iron- and silver sulphide; alcali carbonates; food stuff and soil analysis (Typical properties) Basis weight (g/m²) 84 Filtration time for distilled water (s) 20 Wet bursting strength (kPa) >30 Ash Content (%) 0.01