Disposable mask 1, material safety, mask material must not contain fluorescent agent, fluorescent agent is carcinogen; at present, especially cotton mask, more than 90% of masks contain fluorescent agent. 2. The mask material must be made of brand-new materials, and can not be recycled or added with calcium carbonate; at present, more than 30% of the masks of non-woven fabrics have the behavior of adding calcium carbonate 3. The mask does not contain heavy metals. If the printing and dyeing masks do not use environmental protection pigments, they will contain lead heavy metals; antibacterial masks, especially nano silver anti-bacterial masks, will contain silver ion heavy metals. The mask surface is divided into three layers: inner layer, middle layer and outer layer. The inner layer is skin friendly material, the middle layer is isolation filter layer, and the outer layer is special material antibacterial layer. The darker side is the outer layer. Skin irritation: the primary irritation index of mask material should be ≤ 0.4, and there should be no allergic reaction. 9) Microbiological index: the total number of bacterial colonies is less than or equal to 20 CFU / g, coliform bacteria, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococcus and fungi shall not be detected. [5] 3. General medical mask the ordinary medical mask is used to block the spatter from the mouth and nasal cavity, and can be used for one-time health care in the general medical environment, with low protection level. It is suitable for general health care activities, such as sanitary cleaning, liquid preparation, cleaning bed unit, etc., or the barrier or protection of particles other than pathogenic microorganisms such as flower powder. It meets the relevant registered product standard (yzb), generally lacks the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than those for medical surgical masks and medical protective masks. It can only achieve 20.0% - 25.0% protection effect for aerosol with 0.3 μ m diameter, which can not achieve the filtration efficiency for particles and bacteria, and can not effectively prevent pathogens from invading the respiratory tract It can not be used in clinical invasive operation, nor can it play a protective role on particles and bacterial viruses. It can only play a certain role of mechanical barrier to dust particles or aerosols. [6] Usage: 1. Carefully cover the mouth and nose with a mask and fasten it to reduce the gap between the face and the mask as much as possible; 2. Avoid touching the mask when using it - wash your hands with soap and water or alcohol hand cleaner after touching the used mask, for example, to remove or clean the mask; 3. Replace the mask with a new clean and dry mask after getting damp or contaminated with moisture; 4 Do not reuse disposable masks. Disposable masks should be discarded after each use.

1. Carefully cover the mouth and nose with a mask and fasten it to reduce the gap between the face and the mask as much as possible;

2. Avoid touching the mask when using it - after touching the used mask, for example, to remove or clean the mask, wash hands with soap and water or alcohol hand sanitizer;

3. Replace the mask with a new clean and dry mask when it is damp or contaminated with moisture;

4. Do not reuse disposable masks. Disposable masks should be discarded after each use.