Deciphering Clothing Formaldehyde Ph Value And Other Indicators

In July 28th, the Beijing industrial and commercial bureau announced the results of random sampling of garments. Altogether 65 kinds of clothing were unqualified. Among them, one of JEANSWEST and seven wolves was unqualified.

Subsequently, the clothing quality problem caused the game between clothing companies and the media. Although clothing labels are not qualified, however, many media do not know about clothes. When they fail to see them, they use "toxic" to describe them. This is a misunderstanding.

Deciphering clothing formaldehyde pH value and other indicators

The real toxic clothing is the clothing itself contains harmful substances and beyond the provisions of the state, harm to the human body. There are many opportunities for clothing pollution throughout the production process. For example, cotton and linen and other clothing materials need to use insecticides and herbicides in the process of planting. When textile materials are stored, preservatives, fungicides and moth proofing agents should be used. Chemical agents such as oxidants, catalysts, detergents and whitening agents used in weaving process will make fabric pollution difficult to avoid. The pollution of printing and dyeing is the most serious. Azo dyes and formaldehyde, halide carriers and heavy metals used in printing and dyeing have become health killers. Therefore, from a raw material production to processing and molding, a garment may have the chance of poisoning at any time. The biggest toxins in clothing are formaldehyde, pH value, pesticide residues and dyes.

1. formaldehyde

Clothes made of natural materials are often treated with formaldehyde to prevent worms from eating. The clothes of cotton, linen, wool and leather will remain formaldehyde. Other chemical fiber materials are more or less mixed with natural materials and formaldehyde residues. Wearing this kind of clothing will reduce human resistance and damage epidermal cells. If you wear clothes with high concentration of formaldehyde for a long time, you will invade the viscera of the body and cause cancer.

There are four types of textiles that contain formaldehyde easily. One is ironing clothes; the other two is fashionable jeans, especially those with different colors; three is children's clothing, and four is the clothes stored in wood-based panel furniture. Formaldehyde mainly comes from inexpensive dyes and auxiliaries, so try not to buy clothing that has been crease resistant.

Formaldehyde is easier to dissolve in water, so new clothes, especially children's clothing, after buying home, it is best to rinse with water. If rinse can not be carried out, it must be adequately aired. Some ironing shirts should be opened and packaged for one to two days. If you wear new clothes, if you have skin allergies, emotional upset, poor diet, continuous cough and other symptoms, you should consider the possibility of formaldehyde poisoning. You should go to the hospital as soon as possible.

2.PH value

The pH value of normal skin is acidic, about 4.5 to 6.5. Popularly speaking, the pH value of the skin is the skin glands secreted by the skin and the skin layer formed by sebum, which is attached to the skin and has a good protective effect on the skin. It can prevent bacteria from invading, prevent skin from dryness, and give skin elasticity. If the pH value of clothing is too high or too low, it will destroy the pH balance of the body, stimulate the skin, and even cause skin infections.

Since January 1, 2010, 10 national standards of clothing have been formally implemented. The new standard specifies the pH value and formaldehyde content of clothing. These standards all set specific requirements for the pH value. The pH value of direct contact with skin clothing must be between 4.0-7.5, and the pH value of clothes that are not directly exposed to skin must be between 4.0-9.0. The national standard for Western-style clothes and western trousers has clearly put forward the requirement of formaldehyde content, which should not exceed 300 mg per kilogram.

According to the basic technical specifications for national textile products, textile products are divided into three categories: A, B and C. According to the regulations, the quality and technical requirements of formaldehyde content and pH value should be clearly marked on labels and instructions. Consumers should not only pay attention to the style and appearance while neglecting the health when choosing clothes, but through careful identification, purchase the qualified products of regular manufacturers and wear them reasonably.

Class A is for infants and young children, who is less than 24 months old. Formaldehyde content is not higher than 20mg/Kg, pH value is 4.0-7.5; class B is directly contact with skin products, when wearing or using, most of the products directly contact with human skin. Formaldehyde content is not higher than 75mg/K, pH value is 4.0-7.5; class C is a product that is not directly exposed to skin. When wearing or using, the product does not directly contact with human skin or only a small part of it directly contacts with human skin. Formaldehyde content is not higher than 300mg/Kg, pH value is 4.0-9.0.

3. heavy metal ions

Heavy metal ions in textiles are mainly derived from metal complex dyes. In addition, because plants can absorb heavy metals in soil and environment, heavy metals can also exist in natural fibers such as cotton and linen. The residual heavy metals in clothing come into the human body through contact with human skin, and tend to gather to the liver, kidneys, bones, hearts and brain, thereby causing harm to human health. This is especially serious for children.

4. pesticide residues

In order to control pests and diseases, cotton, linen and other garment materials need to use insecticides and herbicides in large quantities, resulting in pesticide residues in cotton and linen fibers. Although there are very few residues after making clothes, they often do harm to the human body.

5. dyeing degree

Most dyes themselves do not cause cancer, but because dyes are a low toxic substance, if the combination of dyes and fabrics is not strong enough, they will move to the human skin. Because of the catalytic action of sweat and saliva, dye decomposition will cause harm to human health. Clothing in the process of wear, such as friction, water immersion, sweat and other factors, for infants and young children, because they like to suck clothes, it is easier to absorb these harmful substances through saliva.

Clothes containing carcinogenic aromatic amine dyes are particularly illegal. The "decomposable aromatic amine" dye is a carcinogenic clothing dye, and its toxicity is even stronger than that of food dye Sudan. 22 kinds of dyes made from carcinogenic aromatic amines are toxic to humans and are more carcinogenic than Sudan. The reason why textile enterprises use aromatic amine dyes in large quantities is not only the price is low, but also because of its complete coloring, strong coloring, long lasting color and high color fastness. The decomposable aromatic amine dyes are not only insoluble but also indistinguishable from the appearance of textiles. Only by technical inspection can they be found and can not be eliminated.

Knowing the origin of clothing poison source, clothing practitioners can grasp the quality inspection standard of clothing very well. The production and sale of qualified clothing products needs the efforts of all the practitioners of clothing.