How to check the front and back of a disposable mask

Overviews
1. It is a way to distinguish the front and back of a commonly used disposable mask.
2. These include dental masks, surgical masks, and some fine dust masks.
3. When using these disposable masks, there is a lot of misinformation about recognizing the front and back. For example, there are the following misunderstandings.
  1. Selecting the front and back by looking at the trademark.
  2. Referring to the attachment direction of rubber band or fixing strap.
  3. Distinguishing between white side and blue side.
4. However, the above uncertain information is not easily understood and there is a risk that the mask will not be used correctly.
5. Here is an easy and simple way to properly wear a disposable mask.
Materials
1. Disposable mask
  1. It is a mask with three to four horizontal wrinkles.
  2. A wire core is built into the nose of the mask.
Methods
1. The side with the wire core is the top of the mask.
2. Check the horizontal wrinkles when you open the mask. (See illustration)
  1. The side of the horizontal wrinkles facing upwards is the inside of the mask.
  2. The side of the horizontal wrinkles facing downward is the outside of the mask.
3. Check the position of the wire core and the direction of the horizontal wrinkle, and wear it in close contact with the face.
Notes
1. It is easy to remember if you keep in mind that the outer side of the horizontal wrinkles faces upwards and that there may be external contaminants here.
2. If you have any further questions about this, please leave a comment.

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