Filter paper is a paper with good filtration performance. According to different uses and characteristics, filter paper can be divided into multiple types. Here are some common filter paper categories:

Qualitative filter paper and quantitative filter paper. Qualitative filter paper is generally residual ash. It is used for general qualitative analysis and is used for filtering precipitation or suspension in the solution. It cannot be used for quality analysis.

During the manufacturing process, the quantitative filter paper is treated with hydrochloric acid and hydrofluoric acid, and was washed by distilled water to remove most of the impurities in the paper fiber. Therefore Precision quantitative analysis.

In China, Quantitative analysis filter paper is divided into three categories: fast, medium speed, and slow speeds. The filter boxes are classified with leucorrhea (fast), blue belt (medium speed), and red belt (slow speed) on the filter carton.

Coffee filter paper. Filtering paper dedicated to brewing coffee can remove the oily ingredients in coffee.

Tea bag filter paper. This is a kind of low -volume special packaging paper, which is used in the packaging of bubble tea. It requires uniform fiber tissue, without crease wrinkles, and no odor.

Air filter paper. Used to test suspended particles in the air.

Special filter paper. Including eliminating filter paper, chemical analysis filter paper, dyeing filter paper, etc., it is suitable for specific experimental needs.

In addition, the raw materials and manufacturing methods of filter paper are also different, including plant fibers such as chemical wood pulp, cotton pulp, mulberry pulp, glass fiber, synthetic fiber, aluminum silicate fiber, etc., and even metal fibers.

In addition to the above mixed fibers, some fillers should be added according to the formula, such as titanium pink, perlite, activated carbon, diatomic soil, ion exchange resin, etc.