Just don't wash clothes with water, it only uses solvents to remove oil stains or stains, because solvents contain almost no water.

2, the basic steps are:

The first step is pretreatment, which is to remove stains. It uses artificial additives to pretreat seriously polluted dirt and stains insoluble in dry cleaning solvents (such as juice, nail polish, paint, ink, etc.). ).

The second step is the main washing. Put the pretreated clothes into a dry cleaning machine, wash them thoroughly with dry cleaning solvent, and spin them dry.

The third step, post-treatment, the main purpose is to remove the residual dry cleaning solvent in clothes and irons and shape them.

3. How many kinds of dry cleaning solutions are there? What are the advantages and disadvantages of each?

There are three main categories, which are:

A, chlorinated hydrocarbon synthesis solvent, the most commonly used is tetrachloroethylene (PEKCRO), which has good safety and strong degreasing and decontamination ability, but it has a strong corrosive effect on metals, and its hydrolysis main substances are toxic, which is harmful to soil, water quality and human body. In addition, it has a strong dissolving effect on plastic, nylon and other products, so this kind of jewelry (such as buttons, etc. ) Be sure to remove it when washing.

B. Chlorofluoride solvent, the typical representative of which is trichlorotrifluoroethane (CFC- 1 13), etc. Non-toxic, non-flammable, non-corrosive to rubber and many chemical fibers, and cleaner than tetrachloroethylene. However, such solvents have been banned because they destroy the atmospheric ozone layer.

C. Hydrocarbon solvent, namely petroleum solvent, has good washing effect. Clothes washed with this kind of solvent have no peculiar smell common in tetrachloroethylene washing, and have no pollution to human body and environment. In the past, it was eliminated because of poor security. Now with the development of science and technology, security has been solved, so it is more and more favored by dry cleaners.

What is wet washing?

Wet washing is a method of washing clothes with water and detergent, as opposed to dry cleaning clothes with tetrachloroethylene and other solvents.

SATRA Fabric Maintenance Technology Center is always asked which method is better, dry cleaning or wet cleaning.

The answer depends on many factors, including the stain type and fiber content of clothes. Other important factors to consider include time, drying and ironing.

Wet washing is usually carried out in the machine, but it can also be carried out by hand if ultra-soft stirring is needed. In contrast, dry cleaning is always in a suitable specially designed machine.

Wet washing may be the oldest known method of fabric washing, so it certainly cannot be called the invention of the 20th century. Machines, additives and drying methods certainly benefit from modern technology, but the principle has not changed.

Wet washing is developing constantly, for example, suits can be wet washed now, while suits can only be dry cleaned in the past.

Now there are advanced washing machines or "wet washing machines". This machine uses mixed additives. This additive is specially designed to remove and suspend dirt and protect fibers and fabrics during washing.

The advantages of wet washing need to be considered together with its disadvantages.

The advantage is that it can better remove water-based dirt, such as sweat stains, blood stains, coffee stains, tea stains, nicotine stains and so on.

These defects are possible deformation and distortion, wrinkling (increasing ironing difficulty), interlayer separation, fading and prolonged drying time.

Most shrinkage, deformation and wrinkling are caused by mechanical action during washing. These defects can be greatly reduced by reducing the rotating speed of the drum and increasing the washing ability of water on the fabric. This method is different from the traditional method of rolling clothes to loosen dirt. Additives also help protect fibers.

Some fibers do not react well to wet washing. This includes viscose fiber and acetate fiber. Suits with acetate fiber lining are not suitable for wet washing, because the lining is seriously wrinkled and loses its handle when wet washing, and the latter's subsequent finishing process cannot be restored. Some viscose fibers will encounter the same problem in wet washing.