1 First of all, look at the appearance, the regular mask looks straight and shiny;
2. It also depends on the manufacturer, production date and warranty period.
You can try it yourself. Turn off the kitchen, the oil in the pot is hot, stir-fry a dish or pour water directly, and the lampblack will come out at once. Wearing a mask, if it is not stuffy and odorless, is genuine; if it is not, it is fake.
Gas masks are personal special labor protection articles and personal protection articles. They are worn on the head to protect people's respiratory organs, eyes and face, and to prevent toxic substances such as toxic gases, dust, bacteria, toxic and harmful gases or steam. Gas masks are widely used in petroleum, chemical industry, mining, metallurgy, military, fire fighting, emergency rescue and disaster relief, health and epidemic prevention, scientific and technological environmental protection, machinery manufacturing and other fields.