Ahlstrom Grade 615 Qualitative Filter Paper, Creped
Ahlstrom Grade 615 Creped Filter Paper. This fast filtering grade is an intermediate grade between Grade 617 and Grade 631. Grade 615 has a rough surface and is used for filtering aluminum, ferric and magnesium hydroxides. It is also found in general construction filtration work and in the filtration of insoluble iron and ore.