Ahlstrom Grade 962 Filter Paper 27 cm for High-Efficiency Particle Retention (100 Sheets)

Qualitative Filter Paper Wet‑Strengthened GRADE #962, 27cm, Fast Speed

This fast filtering grade is a thinner version of Grade 961 and is recommended for the filtration of coarse and gelatinous precipitates. The creped surface of Grade 962 also offers higher surface area to maintain high filtration speed.

Trusted in labs and industry: Qualitative filter papers such as Grade 962 are widely used in laboratories and industrial settings for general filtration tasks where retention of solids from liquids is required without demanding precise quantitative analysis. These products are made from high‑purity cellulose with wet‑strengthened fibres to withstand routine use with vacuum or pressure setups, and literature on lab filtration underscores their reliability for coarse and gelatinous precipitate removal.

Scientific & Technical Context

Qualitative filter papers separate particulates from liquids by allowing fluid to pass through their porous cellulose matrix while trapping solid matter. In technical documentation, wet‑strengthened grades are identified as suitable for applications where pressure or vacuum is applied during filtration due to enhanced resistance and durability. 

Industry Reviews & User Feedback

Industry catalogues and supplier sites note that wet‑strengthened grades such as #962 are chosen for their consistent performance, high loading capacity, and rapid flow rates when filtering coarse solids. Peer comparisons of qualitative filter papers show they are regarded as dependable consumables for routine separations. 

Common Uses & Applications

Popular uses for qualitative filter papers include clarifying liquids before analysis, separating precipitates in research labs, removing particulates from samples in environmental testing, and general fluid filtration in education and industrial quality control. Feedback from lab technicians highlights their ease of use with standard funnels and compatibility with a range of sample types. 

Product Details

This Grade #962 filter paper is designed for fast filtration with a relatively large pore size, making it ideal for applications where high flow rates and effective separation of coarse particles are priorities. The wet‑strengthened construction ensures the paper maintains integrity even under saturated conditions.

• Size : 27cm
• Pore Size : 27 µm
• Package of 100

To support your laboratory filtration and sample preparation workflows beyond the Filter Paper Grade #962 ‑ 27cm — a wet‑strengthened qualitative filter designed for fast flow and the removal of coarse or gelatinous precipitates in gravity or vacuum setups — consider additional filtration media that enhance particle separation and laboratory efficiency. The Filter Paper Grade #515 32 cm (100) offers a larger pleated format with fast‑flow characteristics suited for viscous suspensions and general fluid clarification.

For broader qualitative filtration needs where similar fast flow and coarse particle retention are required in a larger diameter, the Filter Paper Grade #962 32 cm extends your options with the same Grade 962 media in a larger size. Additionally, the Qualitative Filter Papers Whatman series provides a range of pore sizes and wet‑strengthened options to match various separations and analytical demands across food, environmental, and general laboratory applications.

Q&A

What makes Grade #962 filter paper different from other grades?

Grade #962 is a wet‑strengthened qualitative filter paper with a creped surface that increases surface area for fast filtration of coarse and gelatinous precipitates. It is thinner than some other grades, allowing higher flow rates.

Can this filter paper be used with vacuum or pressure filtration?

Yes. Wet‑strengthened qualitative filter papers are suitable for routine vacuum or pressure filtration setups in laboratory environments thanks to their enhanced wet durability. 

Is this paper suitable for quantitative analysis?

No. Qualitative filter papers are intended for general filtration tasks where exact mass measurement of retained solids is not critical. For gravimetric or quantitative analysis, ashless or quantitative filter papers are more appropriate. 

What are typical applications for this type of filter paper?

Typical uses include clarifying suspensions before laboratory analysis, separating precipitates, environmental sample filtration, and general routine laboratory separations that do not require highly precise measurements.