Later, when I was studying, I knew that psychologists at Stanford University had done a famous "simulated prison experiment", which proved that "you are what you wear" is not empty talk.
Wearing school uniforms is a student, which seems to have certain scientific basis.
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Therefore, it is difficult for you to care about the style of school uniforms. The point is that you should know what clothes are school uniforms.
Obama's wife Michelle visited Chengdu No.7 Middle School (image source network)
According to the regulations of the relevant state departments, school uniforms refer to clothes and accessories made of textile fabrics worn by primary and secondary school students in their daily lives. Accessories of school uniforms refer to small textiles that match school uniforms, such as ties, bow ties and so on.
If one day the school gives you a leather coat, I'm sorry it's not a school uniform, because it's not made of textile fabric.
In addition, there are performance clothes, military training clothes and competition clothes. Not under the supervision of school uniform quality standards, because they are not regular clothes.
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Qualified products
What is the most important thing to wear clothes? Is it a style? Is it a color? What is the material number? No, no,no. You have to think about it, okay? Of course, safety is the most important! Everyone is a small flower, a middle flower and a big flower of the motherland ... naturally, we need careful care.
British Eton school uniform (image source network)
Attention! School uniforms are not graded.
You are not mistaken. Now the grading of school uniforms is true. If you are still obsessed with the old ideas of first-class and second-class products in the past, then you are "OUT".
The latest national standards only set up a qualified line for school uniform products. Only the national standard "GB/T3 1888" needs to be marked on the school uniform signboard, and the product grade is not required.
Of course, if it's no trouble, you have to mark it, that is, the word "qualified product" Why is this? Hehe, that's because the passing line standard of school uniforms is much better than the past standard of excellent products.
No label
Put away your surprised chin and hear me out first. School uniforms are "not allowed to sew any labels on the collar".
Now you know! There are still labels such as washing labels, but they cannot be sewn on the collar.
Clothing label (image source network)
Originally, considering the durability, the material of clothing label is very different from the material of clothing itself and the sewing method. In the past, the label sewn on the collar rubbed against human skin repeatedly, which would cause strong discomfort and even skin damage.
Attention! "Any label" includes trademarks, type labels, washing labels, etc.
Then some people will ask, it is not allowed to sew size marks, so how can we distinguish sizes when issuing school uniforms? There are only two options, one is to mark the packaging bag of the product; Second, you can print the size directly on the clothes with harmless dyes.
Have fun! This time, the relevant departments really took care of these details for the students.
Fabric contains 35% cotton.
A basic condition for a qualified school uniform is that the cotton fiber content in the direct contact with the skin is not less than 35%.
Clothing fiber component label (image source network)
In order to work out the standard of 35% cotton fiber content, experts have taken great pains. From the comfort of school uniforms, 2% moisture regain is roughly equivalent to the moisture absorption of 35% cotton fiber content. According to the convention of China's textile industry, the blended fabric of polyester and cotton fiber is generally 65% polyester and 35% cotton fiber.
Therefore, it is the only direct and easy method to stipulate that the cotton content in school uniforms is 35%. Its purpose is to restrict the use of pure chemical fiber fabrics to make close-fitting school uniforms and make them more comfortable.
School uniform (image source network)
At the same time, there is no hard and fast regulation on the remaining 65% fiber content, which leaves a great choice space for the diversity of school uniform fabrics.
Enterprises or schools can choose other natural fibers, cellulose fibers, functional fibers and other blended cotton fibers according to their own conditions, such as the style and style of school uniforms.
School uniform conference (image source network)
So, which part is considered as "the part in direct contact with the skin"? Underwear, single-coat school uniforms worn in summer, are products that directly contact human skin.
For school uniforms (such as skirts) lined in summer, the lining is the part that directly contacts the skin.
Pin "no"
The accessories required for school uniforms must not have sharp corners and sharp edges that can be touched. Products need to go through needle inspection procedures before leaving the factory, and sharp objects such as metal needles are not allowed to remain on the products. "
In the past, some accessories on school uniforms were designed as pin-fixed styles. Now not only is the pin "dead", but even the zipper on the school uniform and the zipper teeth are not allowed to have thorns and sharp edges.
Pin (image source network)
What is the "needle inspection process"? In the process of making school uniforms, it is inevitable that there will be broken needles in the fabric, which will cause harm to students.
Therefore, all school uniforms must be tested for broken needles before leaving the factory. Abbreviation: needle examination; Commonly known as: over-checking needle.
Sharp objects such as pins are not allowed in school uniforms, which is the most stringent requirement for safety.
Rope requirements
The rope on the school uniform is often ignored by everyone, but it is a major safety hazard, and even causes suffocation and life-threatening when it is serious.
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The national standard gives the most detailed requirements for school uniform ropes, the most important of which is that "the wool and ropes used to tighten the head and neck should not have movable ends, and the ropes in other parts should not have exposed ropes exceeding 75mm"; "The length of waist and abdomen hair and rope from fixed end to free end shall not exceed 360mm, and shall not be lower than the edge of clothing"; "All exposed wool or rope on the clothing should not exceed 140 mm when the necking is at the maximum relaxation state." ...
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From the experience and lessons in reality, some knots in the drawstring, belt end and coat hem of school uniform hats are often caught or hooked by other objects, which may lead to serious casualties.
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Attention! Important things are only said once. It is suggested that both schools and parents should try not to use uniforms with ropes or even children's clothes, just in case. Try to avoid what can be avoided!
colour fastness
The full name of color fastness "color fastness" is a technical term, which translates into the problem of fading of school uniforms. At present, China divides the color fastness into nine grades, namely: 1 grade, 1-2 grade, 2 grade ... 5 grade.
Among them, 1 grade is the worst and grade 5 is the highest. Color fastness standards include rubbing, washing, rain, sun exposure, light, seawater immersion, saliva immersion, water stains, sweat stains, etc.
School uniform (image source network)
When a school uniform with unqualified color fastness encounters water, sweat stains, sun exposure or physical friction, the dye is easy to fall off and fade, and the fallen dye molecules or heavy metal ions may be absorbed by the human body through the skin, which is harmful to health.
According to the school uniform standard, the color fastness of a qualified school uniform to water, sweat, friction (dry friction), soaping, light and sweat should be 3-4. Color fastness to rubbing (wet rubbing) is Grade 3; Colour fastness to light 4.
School uniform (image source network)
Note that the requirement of color fastness to rubbing (wet rubbing) is to reach grade 3 regardless of the depth of school uniform fabric; For acidic solutions and alkaline solutions, the composite color fastness should generally reach grade 3-4.
zipper
The zipper on the small school uniform, if not paid enough attention to, is often a great safety hazard. Practical experience and lessons repeatedly tell us that zipper injury is not a very low probability thing:
Some students were caught in their hair by zippers, some were caught in their eyelids, and even a little boy was caught in a "key position" by zippers.
Zipper (image source network)
In principle, the zipper of school uniforms should be made of nonmetallic materials.
Metal zippers are not only easier to pinch students, but also more difficult to handle after the situation occurs. Furthermore, in order to match the color of the school uniform fabric, these metal zippers are basically electroplated.
Zipper (image source network)
Electroplating is a process of attaching a metal film to the surface of metal or other materials by electrolysis to improve wear resistance, reflectivity and aesthetics. After electroplating, the zipper of school uniforms is prone to the problem of excessive heavy metals.
Note that there are eggs at the end: the most important thing is only said once.
The fiber inspection agency checks the school uniform production enterprises (Source: Lingxi Quality Supervision Bureau)
Nowadays, the state has formulated strict inspection and testing procedures for any school uniform from fabric making to cutting processing until it is finally distributed to everyone.
In particular, school uniform manufacturers should send samples to local fiber inspection institutes and bureaus for testing before school uniforms leave the factory; After passing the test, it can be sent to the school with the test report issued by the fiber inspection department.
After receiving the school uniform, the school can't give it to the students immediately; Instead, these school uniforms must be sampled again for inspection, and students can only wear them after passing the inspection.
Parents are always suspicious of the quality of school uniforms. In fact, as long as they go to the school to check the quality inspection report sent by the school, they can "know all the quality indicators like the back of their hands."