Filter Paper, Grade 5: 2.5-3µm

A versatile and often used filter paper, Grade 1 Filter Paper, has pores that measure 9 micrometres, making it appropriate for common laboratory applications. It balances medium retention with medium flow rate, making it suitable for a range of jobs. For liquid clearing in a variety of laboratory operations, this grade is frequently used. Its efficiency in qualitative analytical separations is widely known, especially for precipitates such calcium carbonate, heated calcium oxalate, and lead sulphate.

A multipurpose filter paper with a particle size of 9 micrometres, Grade 2 Filter Paper is distinguished from Grade 1 by having somewhat higher retention and greater absorption capacity. This property allows for a wider range of applications while extending the filtering time. Despite being appropriate for general filtrations, Grade 2 Filter Paper's improved absorbency finds use in niche jobs. For instance, it's used to keep soil nutrients in during tests on plant growth, which effectively aids in proper research. Its ability to absorb substances also makes it excellent for tracking particular toxins in the air and soil, making it a helpful tool for environmental and soil testing projects.