Ashless filter papers

For quantitative analysis and filtration with low blank values 
Ashless filter papers are particularly suited for quantitative routine  analysis and are manufactured from refined pulp and linters. They are acid-washed and have an extremely low ash content of 0.01%. The amount of a-cellulose is about 95%.

Ashless filter paper grades
Slow filtration, ashless, for filtration of very fine precipitates.

Filter Papers – Filtrierpapiere
Grade / Sorte                                            MN 640 d
Weight / Gewicht [g/m2]                            85
Thickness / Dicke [mm]                              0,17
Filtration speed / Filtriergeschwindigkeit       140
[s]
Surface / Oberfläche                                   smooth / glatt
Ash content / Aschegehalt (%)                     < 0,01
Average retention capacity /                         2 – 4
mittleres Rückhaltevermögen
[μm]
Applications and properties /                        Ashless, slow filtration, for
all fine and extremely fine
precipitates /Anwendungen und Eigenschaften                
Aschefrei, schnell                                        Aschefrei, langsam
filtrierend, für feine und
feinste Niederschläge