Masks are a kind of protective tool that plays a filtering role. The use of masks plays a good role in protecting people. Generally, a multi-layer filter device is used in masks to filter out polluted gases and small particles in the air. So as to better protect people's respiratory tracts, make people's bodies safer and healthier, which also makes the use of masks more important. So how to distinguish the front and back of the mask? Let me teach you all below.
1. Look at the color
Generally, the front side (outward) of medical masks is darker in color, and the reverse side (outwardly) is lighter or white. When wearing, the darker side is facing outward, and the lighter color is the side that touches the face.
2. Look at the crease
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).
3. Look at the metal strip of the nose clip
In addition to distinguishing the front and back of medical masks, it is also necessary to distinguish the top and bottom. 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.
1. Look at the uneven surface
When the N95 mask is opened, the convex side is the front side (facing outward), and the concave side is the reverse side (facing inward).
2. Look at the metal strip of the nose clip
Compared 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. It can be seen that the side of the metal strip of the nose clip is the front side, and the side of the metal strip faces up.
3. Look at the headband orientation
The headband of the N95 mask is located on the front (facing outwards), and the headband will press against the edge of the mask when worn.
1. Look at the color
The darker side of the disposable mask is the front side, and it needs to be worn with the front side facing out, while the light-colored mask is the backside, which will directly touch the face.
2. Look at the metal bar
The mask can be distinguished by the metal strip of the mask. Generally, the side of the metal strip on the top and protruding outward is facing outward.
3. Look at the crease
There will be many creases on the mask, the crease facing down is generally the outer layer, and the crease facing up is the inner layer.
Under normal circumstances, the side of the white flat mask with the thread is the outside, on the contrary, the side without the thread is the reverse side.
Because the outer surface of the mask has a water-blocking function, it is mostly smooth, and the inner layer is mostly made of a material with good air permeability, which is close to the skin, which is good for breathing, is more delicate and comfortable.
After reading the above introduction, I believe you have already understood how to distinguish the front and back of a mask. Everyone must wear a mask in the correct orientation and method so that the mask can be close to the face, block bacteria and viruses more effectively, and provide us with a better filtering effect.