Experts Remind: Clothing Ph Value Can Not Be Ignored.

In January this year, the relevant departments of the state issued new standards, requiring clothing manufacturers to mark formaldehyde content and pH value.

  　　  市民：只看面料款式不知還有pH值

Yesterday, in Xinjiekou, Nanjing, a random interview of people buying spring clothes in shopping malls found that many people only looked at the fabric and style when buying clothes. Most people thought about the price. Almost no one knew that clothes had pH value.

"Many young girls in our company like to buy online clothes, and shopping in shopping mall is just looking at the style. And the clothes bought online usually change for a while. What kind of pH value will anyone notice?"

Ms. Wang, who works in a Hunan Road company in Nanjing, said in an interview with the author.

  　　  專家：pH值超標(biāo)是服裝檢測(cè)常見問題

The author found that compared with the old standards in 2001, the new national standard has been adjusted in many ways, which has increased the assessment requirements for pH value, degradable carcinogenic aromatic amine dyes, dimensional change rate after washing and color fastness.

According to the new national standard, the pH value of clothing that should be directly exposed to the skin should be controlled at 4.0-7.5. The pH value of clothing that is not directly exposed to the skin should be controlled at 4.0-9.0.

The formaldehyde content of suits and trousers should not exceed 300 mg per kilogram.

According to the insiders, in order to make the clothes more smooth, wrinkle resistant and stronger color, clothing containing finishing agents will be used in the process of making clothes.

If a long time wearing formaldehyde super standard clothes, free formaldehyde will evaporate with the friction of clothing and human body, inhalation of human body gradually accumulate, causing respiratory disease.

Doctor: clothing with pH value exceeding standard is liable to cause disease.

Du Changming, chief physician of Department of Dermatology, Nanjing integrated traditional Chinese and Western medicine hospital, said that the pH value of clothing refers to the residual acid and alkali content in fabrics, which is generally required in a neutral range.

The human body's skin is weakly acidic (the pH value of healthy skin is between 5.0-5.6), and the pH value of the general healthy skin is between 5 and 5.6 (floating, not fixed). This helps prevent the invasion of germs. If the pH value of clothing exceeds the standard, it will reduce the immunity of human skin and skin, and will stimulate the skin and make the skin vulnerable to other pathogens.

Du Changming reminded the public that the best choice for close clothing is pure cotton, especially children.

In order to reduce the formaldehyde content in clothing, it is best to wash the clothes like knitted underwear, jeans and so on before wearing them.