On whether glycolic acid causes dyeing
The ancient methods are heard, and the color change of objects is often investigated. Today, there are various opinions on glycolic acid, whether it is dyed or not, and it needs to be studied in detail.

Look at all kinds of materials, the materials are different, and the response to glycolic acid is also different. There is a cloud glycolic acid has unique properties. It touches silk, or can penetrate its texture, but it may not cause color change. The texture of the silk is soft and dense, and glycolic acid enters it. If the molecular movement does not disturb its pigment structure, the color will remain the same.

As for wood, its texture may hide various objects. Glycolic acid is present, or it encounters with tannins and resins contained in wood. When tannins encounter acid, they may change, but the change is not necessarily a color dye. Or only changes in the microscopic state, and it is difficult to observe the appearance of its color change.

Looking at masonry and the like, its quality is firm and stable. Glycolic acid touches it, or only flows on the surface, making it difficult to enter its depth. Although acid is corrosive, the color of masonry depends on the mineral composition within it. If glycolic acid does not change with key minerals, the color of masonry will not change.

In the world, glycolic acid is also transferred to some fresh pigments, which has the ability to promote their fading. The property of glycolic acid, or breaking the bonds between the molecules of the pigment, causes its structure to change and its color to change. However, this statement also needs to be tested. The system of pigments is different, and the composition is different. The effect of glycolic acid on it cannot be generalized.

To know whether glycolic acid is dyed, it is necessary to carefully examine the quality of the material and the state of the environment, and more of them must be tested in reality. It should not be based on speculation alone, but should be based on empirical judgment.