MUNKTELL filter paper no. 292a No.54 Equivalent Filtration Properties: Fast Filtering Applications: For course and voluminous precipitates such as iron-, aluminium- and chromium hydroxide; si- determination in steel and pig iron analysis. (Typical properties) Basis weight (g/m²) 84 Filtration time for distilled water (s) 10 Wet bursting strength (kPa) >5 Dicke Thickness (mm) 0.18 Ash Content (%) 0.06