What does it mean to rub skin care products into mud? Why do you rub into mud?

Skin care products are something that many people like to use, but they can also cause a lot of trouble. What does it mean to rub skin care products into mud? Why do skin care products create mud?

What does it mean to rub mud on skin care products?

Rubbing mud is when using cosmetics. Due to the fat solubility and penetration ability of the cosmetics themselves, the dead skin cells stuck on the skin and the dirt in the pores will be removed, and after repeated rubbing, a mud-like substance will be formed. It's like putting something. When applied to the face, it instantly turns into strips of mud like those left by an eraser. And this mud is actually keratin.

Why do skin care products cause mud?

There are several situations that can cause this phenomenon

1. Old skin and thick stratum corneum

In dry weather, when the skin is severely dehydrated, more dandruff will occur. When skin care products are applied, the flakes of skin mix with the skin care products to form "mud".

When the skin is in the "healing reaction" repair period, the "mud rubbing" phenomenon will occur when the dandruff produced during the skin metabolism process mixes with skin care products!

2. Natural organic polymer compounds (such as protein, hyaluronic acid, etc.)

Their relative molecular mass can range from tens of thousands to millions or even larger, and they are often composed of countless small structural units arranged in a repetitive manner. They can break down under certain circumstances, producing segregation variation. so:

A) Gel products are most likely to cause mud. Since Carbohydrate (a material for making gel products) is a type of high molecular polymer, the products made from it are likely to have muddy appearance.

B) Skin care products containing protein may cause mud rubbing, such as skin care creams with added collagen, etc.

The phenomenon of skin care products rubbing into mud is sometimes caused by incompatible product textures. For example, some moisturizing gels containing large-molecule colloids will rub into mud after encountering powders containing sebum-absorbing ingredients, so you should avoid using ingredients with these two properties together during the maintenance process.

3. Skin care products from different emulsification systems may react with each other and cause mud rubbing

For example, some water containing glycerin will cause mud to form when used with certain skin care products. So I have been using a certain cream without any problems, but suddenly I changed to a softener and applied it before the cream, and it started to become muddy. This is normal.

A) Some people believe that the phenomenon of rubbing into mud is caused by the incompatibility of oil and water in cosmetics. If you use an oil-soluble base under your cream and your frost is water-soluble, it will definitely become muddy. In addition, cosmetics are divided into hydrophilic and lipophilic. If you use lipophilic products on hydrophilic skin, it will basically turn into mud. This is possible;

B) Sunscreen isolation creams usually contain titanium dioxide or titanium dioxide aqueous solution, which are not very compatible with oil and easily form "mud" or white flakes when rubbed.

4. Usage method causes

A) After applying moisturizing cream, essence and other products containing polymer glue and water-soluble thickeners, if you immediately apply foundation or sunscreen products, salts will be produced, which are the white flakes we see with the naked eye;

B) Or it may happen when applying lotion, cream and other products containing hydrophilic strong emulsifiers, such as fatty acid salts, and then immediately applying foundation, moisturizing primer and other products containing metal ions, the ingredients of which will also be replaced from water-soluble to water-insoluble salts;

C) is to apply anti-acne products, such as acid, salicylic acid, etc., and then apply primer and other products containing zinc oxide powder, which can also easily produce precipitation. Apply sunscreen after the skin care routine. If chemical precipitation is produced, it will affect the isolation effect of the sunscreen.

This is the end of the introduction to the meaning of rubbing skin care products into mud, because there is a reason for rubbing skin care products into mud.