1. Medical surgical masks are composed of three layers of different structures. The outer layer is blue, which can help ordinary people distinguish the inner and outer layers of the mask. The white side faces the nose, and the blue side is outward antivirus. Different colors allow users to distinguish between positive and negative, and to wear masks correctly. This is not only a well-known unspoken rule in the medical care industry, but also a good way for ordinary people to use it without causing mistakes to wear.

2. Most of the users of medical surgical masks in daily life are also doctors. If a white coat and mask are white, working for a long time may cause visual fatigue, and the blue stained with blood will not look like white. The same is so prominent, and the surface of the blue outer layer is also treated with water repellent, which is less prone to contaminants.

3. Not all medical masks are blue, but also white. Blue masks are mostly blue. This is because medical masks are usually worn by doctors and nurses in hospitals. The blue color can make the patient feel relaxed and not afraid. The white one has a certain stimulating effect on the patient's vision and makes the patient nervous. There are also medical masks of other colors on the market, such as black and pink, which are generally only worn by residents to prevent inhalation of excessive polite particles. They are generally not used in hospitals.

4. This also makes mask production more convenient. Generally, medical surgical masks that meet the standard have three layers of protection. The blue outer layer of the mask is mainly water-resistant, which can effectively prevent droplets from entering the mouth and nose. The middle layer is the filter layer, which is close to the human nose. That layer is the moisture-absorbing layer. When the mask is produced, the color can be used to distinguish the raw materials of which layer, without causing confusion.

5. The blue color of medical surgical masks is mostly due to historical factors. In addition to blue, there are also pink, white and black to choose from. It’s just that most of the medical surgical masks on the market are blue. This has nothing to do with cost control, but blue can be used by most. Accepted by people, pink men may not accept it, black women may not accept it, the compromise or blue has the widest acceptance range, after all, except for special periods, most people still have their own aesthetics.