NS 44 with fine particle retention is thinner than NS 42. The flow rate of NS 44 is twice of NS 42.It’s a filter paper for critical gravimetric analysis and metal determination of very fine particle...

NS 43 is intermediate in particle retention between Grades 40 and 41.NS 43 is widely used in inorganic analysis in the construction, mining and steel industries，particle collection in air pollution ...

NS 42 is a filter paper for critical gravimetric analysis of very fine particles such as metastannic acid , lead sulfate, barium sulfate ,stannic sulfide, calcium oxalate and calcium fluoride.

Grad...

NS 41 is the fastest ashless quantitative filter paper for filtration of coarse particles and gelatinous precipitates such as aluminum hydroxide, iron hydroxide, zirconium hydroxide and cobalt sulfide...

NS 40 has medium flow rate and particle retention. It is the most commonly used ashless filter paper. NS 40 is used for gravimetric analysis of numerous components (e.g.: cements,copper, clay, bismuth...

The flow rate of NS 6 is faster than NS 5 with similar particle retention. NS 6 is used in the filtration of fine precipitates and recommended for boiler water analysis and gas filtration.

Grade 6 ...

NS 5 is a slow grade qualitative filter paper which is designed to retain fine particles encountered in qualitative analysis. NS 5 is widely used in Büchner funnels and to clarify cloudy suspensions....

NS 4 is widely used for the filtration of gelatinous precipitates and coarse particles such as magnesium hydroxide， aluminum hydroxide and ferric hydroxide. As a fast filter, this grade is also fou...

NS 3 has excellent loading capacity because it is twice as thick as NS 1. The extra thickness gives higher wet strength and superior absorbency. It is suitable for use as a sample carrier. NS 3 is als...

NS 2 has slightly lower filtration speed than NS 1 with finer particle retention and higher absorption. This grade is used to retain particles above 8 µm in size in routine laboratory applications. I...

NS 1 is the most widely used filter paper for general applications. It has medium flow rate and medium particle retention. It is often used in qualitative analytical separations for precipitates such ...