Ahlstrom 601

…0.06% Untreated High wet-strength Consistent performance Wet-strengthened grades available Custom cut Bulk packaging Ahlstrom 601: 2.5µm – Medium Speed This grade covers a wide range of laboratory applications and is used for clarifying liquids and for…

…work or when wet handling is required. Ahlstrom 642: 2µm – Medium Speed This grade has finer particle retention than Ahlstrom 601 but with slightly lower filtration speed. Ahlstrom 642 also has higher absorption than Ahlstrom 601. It is used in general laboratory applications…

…involving instrumental techniques. Ahlstrom 54: 10µm – Fast Speed This is a fast filtering grade for rapid filtration of coarse particles and gelatinous precipitates such as iron, zirconium and aluminum hydroxides, and cobalt sulfide. Ahlstrom 54 is also used in air pollution…

…require filter paper. The first extraction is done with Hydrochloric acid; Grade 601 is recommended. The filtrate is precipitated and filtered with Grade 54. Again the filtrate is treated and re-filtered with Grade 601. The final precipitate step is filtered with Grade 94. ASTM D5298-10…