Ahlstrom Corporation

Grade 542: 2 µm Pleated (Fluted) Filter Paper. Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials...

Ahlstrom Grade 237: 3 m - Medium Speed (non wet-strengthened). This high absorbency grade is twice as thick as grade 642 with similar particle retention. The superior absorbency offers excellent...

Ahlstrom Grade 601: 2.5 m - Medium Speed (non wet-strengthened). This grade covers a wide range of laboratory applications and is used for clarifying liquids and for rapid filtration of coarser...

Ahlstrom Grade 609: 4 m - Medium Speed (non wet-strengthened). This grade is an evolution of Ahlstrom 613 for use in the beer industry. This is a filter paper with an extremely low iron and nitrogen...

Ahlstrom Grade 610: 1.5 m - Slow Speed (non wet-strengthened). This grade is a slow flowing filter designed to retain fine particles encountered in qualitative analysis. Ahlstrom 610 is widely used...

Ahlstrom Grade 613: 6 m - Medium Speed (non wet-strengthened). This is a strong filter paper with a medium flow rate and retention. Ahlstrom 613 is commonly used in student laboratories. This strong...

Ahlstrom Grade 617: 35 m - Fast Speed (non wet-strengthened). This is an extremely fast filtering grade and has a larger particle retention than Ahlstrom 631. Ahlstrom 617, a thicker filter paper...

Ahlstrom Grade 631: 10 m - Medium Speed (non wet-strengthened). This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides...

Ahlstrom Grade 642: 2 m - Medium Speed (non wet-strengthened). This grade has finer particle retention than Ahlstrom 601 but with slightly lower filtration speed. Ahlstrom 642 also has higher...

Membrane filters are surface micro filtration filters used to remove particulates on and near the surface of the filter matrix by mechanical means. They are made of different polymers and are...

Grade 8613: 4 µm - Sugar Testing Filter Paper. Designed for the sugar industry, this grade has a smooth black finish for use in applications requiring visual examination of particles.•...

Ahlstrom Grade 320: 2.48 mm Thickness; 240 mm /30 min. Absorption Speed. This super thick grade is one of the thickest papers on the market. Ahlstrom 320 offers extremely high flow and is recommended...