(1) Types and styles

Generally, when we open a mask, there is a steel bar which we called nasal line. The soft, elastic ear band can solve the problem of making the ears tried and sore when wearing a mask for a long time. The invisible moldable bar can adapt to various kind of face types, avoiding the occurrence of pressure mark on the face. Comparing to flat face masks, 3D face masks gives the user more space. It prevents the problem of feeling stifling when sweats.

The chairman recalled that, at the time when SARS broke out, many people purchased virus-inactivation face mask, activated charcoal face masks, general medical face masks and general cotton masks. People generally do not have much knowledge about these four types of face masks, so they misuse them frequently. The chairman told us the so called N95 face masks is those which prevent over 95% of smog, which includes 95%, 99% and 99.7%. From the beginning of its invention, N95 face mask was designed to be able to prevent bacteria that are under 0.1 micrometers. Another type of mask, the activated charcoal mask, serves the main purpose of resisting formaldehyde. It can be used in special working occasions, such as spray-painting industries and chemical plants with heavy smog, to prevent heavy pollution, dust, viruses and chemicals.

When the general public enters various kind of venues of assembly, they need use medical masks of three layers. Face masks made of cloth are reusable, which can prevent waste and are friendly to the environment. Based on the situation now, unless being sick and having to change a mask every two to three hours, the general public can change a mask a day. There are three types of masks in the market:

  1. the standard mask or masks made of gauze: only capable of filtering bigger particles. Can be used in cleaning work.
  2. Surgical masks: Capable of blocking over 90% of 5 micrometer particles. Should be changed every day. When broken or gets dirty, should be changed instantly. Suitabe for hospitals and clinics.
  3. activated charcoal masks: Capable of absorbing gas and toxic dusts. Without antibacterial function. When breathing with effort or incapable of absorbing odor, should be changed instantly. Suitable for spray-painting or pesticide spraying.
Image:Comparison of types of common masks / Image Source:Google Search