There are only five codes:

1, medical protective mask (GB 19083-20 10).

2. Medical surgical mask (YY0469-20 1 1).

3. Disposable medical mask (YY/T 0969-20 13).

4. Daily protective mask (GB/T 326 10-20 16).

5. Children's masks (GB/T 38880-2020).

Masks without the above codes do not meet the epidemic prevention standards. The state also has clear regulations on the printing and dyeing quality of civil masks:

It is required that the color fastness of the inner and outer layers of the mask is not lower than Grade III. In order to prevent the dye from falling off, please check whether the mask you bought meets the epidemic prevention requirements!

Precautions for choosing a mask:

When choosing a mask, pay attention to the appearance of the mask. The surface of the mask is neat and uniform, without damage and stains, and the size is consistent with the standard size. Some masks imported from abroad and sold separately have no packaging information, which can be judged by the texture of the masks.

Fake and shoddy masks are generally thin, with only one layer or three layers, but the middle layer is not meltblown nonwoven fabric; There are at least three layers of formal and qualified medical masks, and the outer layer feels smooth. After cutting, you will see an obvious three-layer structure, which has poor light transmittance and no obvious weaving.

Normal masks should be odorless and tasteless. Try not to buy masks with pungent or unpleasant smell, and pay attention to buy masks with strong fragrance.