How to distinguish the front and back 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. 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. 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.

Judging by color

Generally, what we see is the blue medical surgical mask. The blue side is the outside, and the light color (white) side is the inside (close to the face). In addition, there are pink and black, which can also be judged according to this principle.

Judging by printing

If the mask is printed with a logo or brand name, it is easy to judge. The embossing of the logo or brand name is usually printed on the outside. Then you can know which side is outside by reading whether the words are correct.

Judging by the direction of folds

What if you buy a mask that is pure white and doesn’t print any font? It’s OK. We have an ultimate judgment: look at the direction of folds!

There are two kinds of folds in the mask

Three folds

The direction of the fold downward is the outside:

Four fold

There is also a kind of mask with four folds, which is a better judgment. You can naturally open it. The middle one is convex, so this side is the outside. In fact, it’s easy to understand, so that our mouth and nose have a certain space to breathe.

After spreading, the direction of the upper two folds is upward, and the direction of the lower two folds is downward.

At this time, it is necessary to replace the mask in time. In addition, the disposable medical surgical mask, kn95, has a protective effect on virus prevention Masks and N95 masks.