The more foam the cleanser has, the stronger the cleansing power?
Does the little sister who guides the shopping at the counter often say this to you:
Our XX facial cleanser is rich in foam and dense, so it is cleaner than ordinary facial cleanser.
This is not the case!
Foam in cleaning products is a mixture of surfactant + air + water.
The abundance of foam is related to the type, dosage, foaming mode and overall formula of surfactant, but it has nothing to do with cleaning power.
Many facial cleansers on the market actually have no foam at all, but they can also be washed very clean.
If the guide does this again next time, you can give her a smile of fans!