What is the unit of a mask? How to distinguish the front and back of a white disposable mask?

Masks are sanitary products used to filter the air entering the mouth and nose. By wearing the mask on the face through a pair of ear hooks, it covers the mouth and nose while filtering and blocking harmful gases, viruses, odors and other substances, thereby playing a certain protective role. So what is the unit of the mask? How to distinguish the front and back of a white disposable mask? Let's open it and learn about it together!

Contents of this article

1. The unit of the mask

2. How to distinguish the front and back of white disposable masks

3. What does non-sterile mask mean?

Mask unit

The individual unit of a mask is usually "副". "副" is a Chinese quantifier, often used before nouns such as paired or set objects to indicate quantity. Masks are a pair of sanitary products. By wearing the mask on the face through a pair of ear hooks, it covers the mouth and nose while filtering and blocking harmful gases, viruses, odors and other substances, thereby playing a certain protective role.

The individual units of masks also include "piece" and "piece", which are more oral units and are generally used when people communicate verbally in daily life.

Objects generally use quantifiers as units, such as "piece", "item", etc. Protective clothing, which is a type of protective equipment like masks, is measured in "pieces".

How to distinguish the front and back of white disposable masks

You can distinguish the front and back of a white mask by looking at the thread ends and the wrinkles on the mask. Generally, the front of a white mask will have thread ends and the wrinkles will face downwards, while the back of a white mask will have no thread ends and the wrinkles will face upwards.

No matter what style of disposable mask, it cannot be reused.

The best time to wear a disposable mask is 4-6 hours.

When purchasing disposable masks, you should choose masks that clearly state "medical surgical mask" on the outer packaging, which will provide greater safety.

What does non-sterile mask mean?

Non-sterile masks are ordinary dust masks. Non-sterile masks are not sterile, and their protection focus is not to isolate bacteria. They cannot effectively isolate bacteria and viruses. They are only suitable for dust and wind protection, etc., and are a mask with a weaker protection level.

Masks are sanitary products used to filter the air entering the mouth and nose.

When wearing a mask, if you touch the outside of the mask with your hands, your hands may be contaminated by the outside of the mask. If you then touch your nose and eyes with your hands, the virus will enter the human body unknowingly.

When taking off the mask, it should be removed using the rope and discarded in the air, trying to avoid the mask touching any part of the body.