Filter paper circles Munktell grade 388 black spot, 150 mm Ø

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suitable for quantitative analysis, extremely low ash content (approx. 0.007 %), wet-strength, acid-washed, for coarse and voluminous precipitates such as iron-, aluminium- and chromium hydroxide, SI-determination in steel and pig iron analysis, fast filtering, wide pores, soft, lose structure, coarse crystalline, filtration velocity 10 s/10 ml, filtration time (Herzberg) 70 s/100 ml | 850 ml/min., basis weight 84 g/m², typical pore size (retention range / recommended guide) 12-15 µm, 100 circles in a pack