The new national standard according to the protective effect of the mask protection level is divided into A, B, C, D four levels, levels corresponding to the protective effect of not less than 90%, 85%, 75%, 65%; all levels of the applicable pollution environment for serious pollution, serious and the following pollution, serious and the following pollution, pollution, moderate and the following pollution.

In order to meet the protection needs of people who still need to go out in the case of severe air pollution, the standard set up a special level of protection. In addition, the new standard also makes detailed provisions for nine internal indicators, such as color fastness, formaldehyde, suction resistance, microorganisms, and field of vision below.

Extended information:

Chinese Consumers Association and China Textile Business Association comprehensive analysis of information from all parties pointed out that consumers should have a correct knowledge of the mask products, do not have to pursue the highest level, should be used correctly to avoid waste.

The different levels of masks on the market have different protective capabilities, medical protective masks for professional health care workers in special positions, under normal circumstances, consumers can meet the basic requirements for protection using ordinary medical masks, daily haze masks also have a certain degree of protective effect. Cotton masks, sponge masks and activated charcoal masks for the prevention of viral infections without protection.

Reference:

People's Daily News - National Standards Commission: daily protective masks have a national standard