Qualitative Filter Paper, Creped Surface

Photo of Whatman Grade 230 Reeve Angel Creped Qualitative Filter Paper

Whatman Reeve Angel Grade 230 is a general qualitative filter with creped surface. High filtration speed and high loading capacity. Widely used in industrial laboratories and students laboratories for routine filtration. The filter is wet-strengthened with a small amount of chemically stable resin to extend the life of the filter and improve handling. Normal qualitative applications will not introduce any significant impurities into the filtrate.

Photo of Whatman Grade 202 Reeve Angel Creped Qualitative Filter Paper

Whatman Reeve Angel Grade 202 is a general qualitative filter with creped surface and medium filtration speed. Faster than grade 201 and retain large crystalline coarse particles. Widely used in industrial laboratories and students laboratories for routine filtration. The filter is wet-strengthened with a small amount of chemically stable resin to extend the life of the filter and improve handling. Normal qualitative applications will not introduce any significant impurities into the filtrate. However it is not recommended for Kjeldahl nitrogen analysis. 100/box.

Photo of Ahlstrom 615 Qualitative Creped Filter Paper

This fast filtering grade is an intermediate grade between Ahlstrom 617 and Ahlstrom 631. Ahlstrom 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. Ahlstrom

Photo of Ahlstrom 617 Qualitative Creped Filter Paper

This is an extremely fast filtering grade and has larger particle retention than Ahlstrom 631. Ahlstrom 617, a thicker filter paper with higher loading capacity, is used for rapid filtration of coarse particles and gelatinous precipitates such as in oils and resin solutions. Ahlstrom 617 is also found in construction product testing and is used by students to retain large flocculents and precipitates. Ahlstrom

Photo of Fast Flow Pre-Pleated Filter Paper, Ahlstrom 515
Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom's pre-pleated grades can save valuable time and maximize the efficiency of the laboratory filter system. Pleating improves the effective surface area increasing flow rate and loading capacity thus decreasing filtration time. Pleated circles are available in 12.5cm to 50cm diameters. Ahlstrom