How to Choose the Right Filter Papers?

As a mechanical-physical operation, the scientists in the lab use filtering paper to separate solids from fluids. solids in the fluid which are bigger than the pole of the filter media, can stay on and within the surface of the filter media, by interposing a porous media through which only the fluid can pass.

You can find filter papers in a variety of different options available around. It is very important that you choose the right type for your filtration. In other words, the success of filtration in the lab depends on your choice of filter paper, with the consideration of combing two important features: retention and flow rate.

Hawach provides filter papers in the range of qualitative and quantitative types to meet all of your particular needs for your application. And all Hawach filter paper is made from pure cotton linters with ash content mainly less than 0.006%.

We guarantee that all the Hawach filter paper is always produced under strictly controlled manufacturing conditions to assure stable high quality.

About Choosing the Right Filter Paper

The common shape of the filter paper is round and is made of cotton fiber, so there are numerous holes on the surface for liquid particles to pass through, while larger solid particles cannot pass. This property allows the separation of liquid and solid materials that are mixed together.

How to choose the right filter paper

Choosing the right filter paper can be determined by considering the following four factors.
1. Hardness: Filter paper will become wet when filtered. Some long-term filtration experiments should consider the use of tough filter paper after wet water.

2. Filtration efficiency: The degree and size of the water-permeable pores on the filter paper affect its filtration efficiency. High-efficiency filter paper has fast speed and a high resolution.

3. Capacity: The solid particles accumulated during filtration may block small holes in the filter paper. Therefore, the denser the water seepage pores, the higher the capacity, and the more filtration allowed.

4. Applicability: Some filter papers are made by special steps. For example, it is necessary to use nitrogen-free filter paper in the test medicine for measuring the nitrogen content in the blood.

Please note that filter paper cannot filter zinc chloride, or the filter paper will be corroded and damaged by zinc chloride.