The Five Experiment Reveals The Truth Of Children'S Clothing.

Reporters visited the China Merchants Association consumer product quality safety supervision and inspection center to observe the children's clothing experiment process.

The test personnel used the "gray card" to compare the sample color level.

Photo 2: fiber extracted from children's clothing is made of coarse cotton and polyester.

The extraction liquid of clothing cloth is pale yellow after color test.

The test personnel detected concentrated extracts by special instruments.

A triangular bottle containing clothing and distilled water is extracted in the oscillator.

The Beijing consumers' Association has found that 21 children and infant clothing samples are not up to standard by comparison experiments. How are these clothes checked out? In May 25th, the reporter came to the comparative test commissioned inspection agency, the China commercial Confederation consumer product quality and safety supervision and Inspection Center (Beijing), and asked the testing experts to show and expose the truth behind children's clothing by operating 5 experiments on children's health and safety.

Because of the larger number of children's clothing, it is impossible to deal with the problem products more clearly and clearly. Each experiment only selects one problem sample to reproduce the experiment process for readers.

Experiment 1

Dyestuffs are easily dyed and easily absorbed by human body.

Objective: to test the color fastness to rubbing and to see whether it is easy to fade or fade.

During the experiment, the inspector sampled the black black girl's woven velvet trousers (LPTE095601) and cut out a small piece of trousers with scissors and placed it on a professional "brush and color fastness tester", and placed a white cotton lining on it. The instrument was dry back and forth 10 times on the top.

Then put another white cotton lining with water and put it on the cloth. Wet and rubbed 10 times with the instrument, and then wet the two pieces of cotton pad with a black round sample.

After the samples were dried, the two samples were taken to the standard light source, and the rating was evaluated by "gray card".

The test results showed that the wet rubbing samples of the black girls' woven velvet trousers (No. LPTE095601) were darker than those detected by the inspectors. The level of the samples was 2-3, and the standard of the children's wear was 3-4 or more.

Expert interpretation: Lee Soo Young, director of the laboratory of consumer goods quality and safety supervision and Inspection Center (Beijing), China Federation of Commerce, said that the color fastness of the sample is not too high, the lower the level, the deeper the color.

A total of 10 samples of children's clothing were found to be out of standard color fastness.

Lee Soo Young pointed out that very poor color fastness may pfer dye or pigment to sweat, absorbed by the skin, although there is no sufficient evidence that dyes in textiles are harmful to human body, improving the color fastness of dyed products can greatly reduce this risk.

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Experiment 2

Identification of clothing materials can be used "ignition method".

The purpose of the experiment is to test the material of the children's dress with nominal "all cotton".

Experimental process: the inspector will mark a 100% cotton "fashion Beibei" round collar short sleeve children's clothing open, open, pull out the fiber, found that there is a very small line, and the other is slightly thicker.

Take two lines respectively, put them on the glass sheet, scatter them, drop paraffin wax, and prepare the samples under electron microscope.

Experimental results: the inspector introduced that the thick lines on the screen contained two components, which were naturally twisted and cotton, while the smooth stick was polyester in chemical fibers, that is, polyester fiber.

Another fine fiber should be spandex.

After preliminary qualitative analysis, the testing personnel should also conduct quantitative detection of the specific contents of cotton, spandex and polyester fibers through chemical methods.

Finally found that the "fashionable Beibei" brand (no manufacturer's information, No. 2158) round neck short sleeved sample, the fiber composition was measured as cotton 53%, polyester 40.1%, and spandex 6.9%.

Expert interpretation: Lee Soo Young introduced that fiber composition content is the main quality index of clothing.

The comparison test found that there were 10 kinds of samples which were not consistent with the actual fiber content. 5 of them were labeled "cotton" but not all cotton, and some of them were different from each other.

In addition, the inspector also taught reporters a relatively simple way to distinguish: take a small piece of clothing fiber, ignite with lighter, and cotton will turn ash, and if there is chemical fiber material, it is not ashes after burning, but atrophy into a little black ball.

Experiment 3

Washing can reduce formaldehyde content in new clothes.

The purpose of the experiment is to test whether formaldehyde exceeds the standard.

During the experiment, the inspector cut a small section of "Cong Yi" trousers and weighed 2 grams into the grinding glass bottle, adding the distilled water 100ml to the experiment, then extracting the samples from the chopped clothes (1 hours in the oscillator), adding acetylacetone, and developing the color reaction.

Half an hour later, the liquid in the test tube appeared pale yellow.

Then, we need to pour the liquid into the colorimeter and take the visible spectrophotometer and then do the colorimetric measurement.

The results showed that the formaldehyde content limit of children's clothing category B was less than 75mg/kg, while the detection found that the formaldehyde content of the "Cong Yi" brand trousers (No. 019) was 179mg/kg and exceeded 2 times.

Expert interpretation: Lee Soo Young said, formaldehyde will stimulate the eyes, skin and mucous membrane, part of the textile in the production process uses formaldehyde containing additives, resulting in formaldehyde content exceeding the standard.

The residual formaldehyde in clothing may be caused by the use of formaldehyde finishing agent in order to maintain good evenness and prevent fading.

She pointed out that formaldehyde is a stimulant gas that can enter the body through diet, breathing or skin contact. It can cause strong irritation to human mucosa and respiratory tract and damage health.

At the same time, because formaldehyde is a volatile substance, it is easy to dissolve in water. The new clothes should be washed first and then worn to reduce formaldehyde residue.

Experiment 4

PH is too high to irritate the skin.

Objective: to test whether the pH value of children's clothing meets the requirements.

Experimental process: similar to formaldehyde experiment, take out a CALISSE children's home clothes (Class A, number ULSCS302), cut a small section, weigh 2 grams into the grinding glass bottle, add water for experiment.

Extract the liquid into the oscillator for 2 hours and then filter it into the acidity meter.

The result of the experiment: the acidity meter shows that the pH value of CALISSE children's home clothing (a, ULSCS302) is 9 pH, which is distributed by the general agent of the Dalian Korean brocade Trade Co., Ltd. and the Beijing XXX clothing factory.

This is an environment which is too alkaline and does not conform to national standards.

Expert interpretation: detection personnel introduced infant clothing for category a clothing, the standard pH value is 4.0-7.5, while children's clothing category B pH value is 4.0-8.5.

Lee Soo Young said that the pH value of 1-14 indicates the pH value from acidic to alkaline. The pH value of clothing is slightly acidic (slightly below pH7) and neutral, which is beneficial to human skin and prevents the spread of disease.

If the pH value of clothing is too high or too low, strong acid or alkaline will cause skin allergy, irritation and even infection.

For children's clothing with pH value exceeding standard, washing more also helps to reduce the pH value.

Experiment 5

Carcinogenic aromatic amine dyes cannot be washed away.

The purpose of the experiment is to test whether there is any banned carcinogenic dye in children's clothing.

During the experiment, the inspector cut a part of a naughty dog short sleeve (no manufacturer's information, Z016L), which was purchased from Bai Rong World Trade mall, and sampled and weighed it. After 1 hours of extraction, a reducing agent was added to the liquid, then solid phase extraction was carried out. After that, the liquid was placed on the rotary evaporator for concentration, and the sample after being concentrated was processed into a brown glass bottle.

The detection of 24 banned decomposable aromatic amine dyes was performed on a GC / MS detector.

Experimental results: after more than 40 minutes, the chromatogram displayed on the screen is a high and low wave peak pattern similar to that of electrocardiogram, and there are two distinct peaks of high characteristic. The corresponding substances are benzidine, 3, 3 '- two methoxy biphenylamine, all of which are banned, decomposable aromatic amine dyes.

Expert interpretation: Lee Soo Young pointed out that the aromatic dyes in unqualified dyes are susceptible to allergies caused by skin absorption. Long term contact with human body can lead to canceration of human cells, but this dye is colorless, tasteless, insoluble in water, and can not be eliminated or mitigated by washing. It is difficult for consumers to distinguish them through naked eyes, and only through specialized instruments can they detect it, so the harm is more serious than formaldehyde.