It can be seen that the metal strip of the nose clip is the front side, and the metal strip is facing upwards. Look at the metal strip of the nose clipĬompared with the relatively hidden metal strips of the nose clip for medical masks, the metal strips of the nose clip of the N95 mask are generally exposed. When the N95 mask is opened, the convex side is the front side (facing outward), and the concave side is the back side (facing inward).Ģ. The end of the metal strip with the nose clip (there is a relatively hard horizontal strip when touched by hand) is facing up, and vice versa. In addition to distinguishing the front and back of medical masks, it is also necessary to distinguish the top and bottom. The face of the medical mask with the crease facing down is the front side (outward), and the face with the crease facing up is the reverse side (outward).ģ. When wearing, the darker side is facing outward, and the lighter color is the side that touches the face. Generally, the front side (outward) of medical masks is darker in color, and the reverse side (outwardly) is lighter or white.
#Distinguish front and back jm32 how to
So how to distinguish the front and back of the mask? , So as to better protect people's respiratory tract, make people's body safer and healthier, which also makes the use of masks more important. Generally, a multi-layer filter device is used in masks to filter out polluted gases and small particles in the air. The use of masks plays a good role in protecting people. In addition, the disposable medical surgical mask, kn95, has a protective effect on virus prevention Masks and N95 masks.Masks are a kind of protective tool that plays a filtering role. In fact, it’s easy to understand, so that our mouth and nose have a certain space to breathe.Īfter spreading, the direction of the upper two folds is upward, and the direction of the lower two folds is downward.Īt this time, it is necessary to replace the mask in time.
The middle one is convex, so this side is the outside. There is also a kind of mask with four folds, which is a better judgment.
The direction of the fold downward is the outside: We have an ultimate judgment: look at the direction of folds! What if you buy a mask that is pure white and doesn’t print any font? It’s OK. Then you can know which side is outside by reading whether the words are correct. The embossing of the logo or brand name is usually printed on the outside. If the mask is printed with a logo or brand name, it is easy to judge. In addition, there are pink and black, which can also be judged according to this principle. The blue side is the outside, and the light color (white) side is the inside (close to the face). Generally, what we see is the blue medical surgical mask. In addition, once the validity period of the mask has passed, or there is a breach or humidity, its protective effect and function will disappear. In addition, after wearing the mask, you should cover the fold of the nose clip with both hands and blow two times continuously to judge the tightness of the mask. Most disposable medical masks are light blue, the light blue side is the outside, the color is slightly light, the white side is the inside, this side is close to the skin, there are folding nose clip, the part with folding nose clip is the top, both sides are elastic band, it is convenient to use.
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