What is the principle of dry cleaning?

In addition to water washing, dry cleaning is also something many people do in our lives. But why can dry-cleaned clothes be so clean? What is the principle behind it? Everyone can learn about it, so that we can know whether dry cleaning clothes is good or not.

1. Principle of dry cleaning: Most of the dirt on clothes is formed by dust in the air adhering to oil or grease and then adhering to the fibers. Oil or grease mainly comes from human body fat, cooking oil and automobile exhaust. The function of dry cleaning agents is to quickly dissolve the oil or grease that causes dust to stick to fibers. Adding specially selected dry-cleaning aids to dry-cleaning agents can suspend dust and prevent it from depositing on the clothes again. The free dirt can then be separated from the dry cleaning agent by filtering or distillation.

2. Water-soluble dirt such as mud, food and beverage stains are difficult to remove using only dry cleaning agents. In order to enhance the stain removal ability in this area, a small amount of a mixture of water and dry cleaning aid is usually added during the dry cleaning process. Modern dry cleaning additive formulas generally contain enough moisture, so there is no need to add water. A mixture of dry cleaning aid and water can also be used to wash stains directly on clothes before dry cleaning. In this way, a small amount of water is introduced into the dry cleaning agent system in the form of an emulsion. This process is usually called pre-decontamination. Since so little water is added, the dry cleaning machine essentially maintains "dry cleaning" conditions, minimizing shrinkage, fading, deformation, and all other problems that can be avoided with dry cleaning agents.

3. Descaling principle Four major categories of dirt and corresponding removal methods a. Soluble in organic agents - solvent-soluble dirt, such as grease, is removed with solvents; b. Soluble in water - water-soluble dirt, such as salt and sugar, is removed with soap oil; c. Insoluble in solvents and water - insoluble dirt, such as dust and metal oxides, is removed with mechanical force; d. Local dirt that requires special treatment - stains and ink, is removed with special chemicals on a stain removal table.