Now the mask must implement the GB2626-2006 standard. The grades of dust masks are divided into three grades: KN100, KN95, and KN90. Among them, KN100 can achieve nearly 100% (over 99.97%) protection against ultrafine dust (with a particle size of 0.75 microns). For large particles, KN95 grade can be selected.

The protective effect of dust masks depends on two aspects. It was once the filtration efficiency of the filter cotton. The second is the tightness of the combination of the mask and the face.

Therefore, masks must be divided into different sizes, and the fitting effect of masks regardless of size and face varies from person to person.

The scientific selection of dust masks certified by the GB2626-2006 standard helps prevent lung injuries.

1. Choose the duplex half-mask type. Disposable masks are not suitable for long-term or occupational protection due to their high air leakage rate.

2. Choose KN100 grade dustproof filter cotton to use. Low protection rate will cause physical injury.

3. It is more comfortable to choose silicone material. It is suitable for long-term wear and is not easy to cause allergic reactions. Masks with high hardness are easy to cause facial indentation.

4. Masks are divided into sizes, which is extremely important. Do not buy those so-called universal masks. Easy to leak.

5. There are two types of masks covering the nose and mouth, covering the nose and mouth, and the jaw. The latter is recommended, which is relatively comfortable.

6. It is recommended to choose a smooth breathing mask. Some masks are designed with double filter cotton, and the filter cotton has double sides, so that such masks can breathe relatively smoothly.