12 constellation which mask is good _ who wears a mask in the twelve constellations is the best to look at the top five.

Is the black mask better or the blue mask better? How many colors do disposable medical masks have?

1 Black mask is better than blue mask. Black mask and blue mask are only color differences, mainly depending on what kind of mask they are.

Such as disposable masks, disposable medical surgical masks, kn95 masks, etc. They come in a variety of colors, including black, blue, pink, white and gray.

Therefore, we can't judge which mask is good just by color. The masks of the same type have different colors, but the protective effect is the same, and there is no difference.

Disposable medical masks come in several colors. Disposable medical masks usually have only one color, that is, one side is white and the other side is light blue or light green, in which the white side is worn inward and the colored side is worn outward.

But ordinary disposable masks have many colors, such as blue, pink, black and gray.

3 Is the black disposable mask safe? Black disposable masks are also safe.

Masks belong to personal hygiene products, and the masks produced need to meet the relevant national standards and have certain protective effects, so they are safe. And the color of the mask doesn't mean anything, but everyone likes different colors, so you can choose any color.

But note: it is recommended not to buy printed masks, because printing on the fabric of the mask may reduce the protective effect of the mask.

4 How to judge the front and back of a black mask? 1. Look at the color: the black side is heavier and the black side is lighter, so the lighter black is inside and the heavier one is outside.

2, look up and down: If it is black on both sides, you must first judge up and down, the mask has a metal nose clip, and some are on it.

3. Look at the folds: the folds under the metal nose clip are the outside, and the upward side of the folds under the metal nose clip is the inside, which is the side that contacts our skin.

4, look at the logo: some masks have the same folds on both sides, but there are commodity signs, that is, logo, which is easier to distinguish, with logo facing outwards and without LOGO facing inwards.