On the reasons for the stickiness of glycolic acid
In modern times and as a skin care agent, glycolic acid is quite commonly used. However, there are many doubts about the use. Why does glycolic acid feel sticky to the touch? There are three reasons for this.

One is related to its molecular properties. Glycolic acid contains carboxyl and hydroxyl groups, both of which are highly hydrophilic. In the air, its molecules are easily attracted to water vapor, and water molecules adhere, causing the surface to be moist and sticky. Like a spring wet coat, it is difficult to dry after drying for a long time, because of air moisture and matchmaking fabrics. Glycolic acid absorbs water vapor on the surface of the skin, just like a wet coat, and feels self-adhesive.

Second, it is related to the formula. When preparing, it is often accompanied by additives such as thickeners. The thickener acts to make the product conformable and stable. However, if the dosage is improper or the selection is improper, the thickener interacts with glycolic acid, or changes the rheological properties of the system, and the viscosity increases. For example, if the pulp is adjusted, the ratio of water to powder is improper, and the pulp is too thick and sticky.

Third, the skin's own state is affected. Human skin secretes oil and sweat, which meet or react with glycolic acid. If the skin's oil secretion is strong, glycolic acid and oil are mixed to change the viscosity of the mixture. If oil and water are mixed, the shape and viscosity after stirring are different from before. And the water content of the stratum corneum of the skin is different, which affects the absorption and retention of glycolic acid differently, and also affects the feeling of stickiness.

In summary, the stickiness of glycolic acid originates from the interaction of molecular hydrophilicity, formula factors and the skin's own state. Users understand this, or they can take appropriate measures to optimize the use of the method for a better experience.