The safety of cosmetics has always been concerned by countries all over the world. At the same time, countries have established strict regulations and instructions to ensure the safety of the public in the use of cosmetics. So how do we usually identify the quality problems of cosmetics? The following editor introduces the method of testing cosmetics for you, come and have a look!
The method of testing cosmetics silver ring to judge the amount of lead
Before using a kind of cosmetics, try it on the back of the hand or the root of the ear. These two parts are the most sensitive areas for human perception. After evenly applying, rub the silver ring (other silver products can also be replaced) on the application area with a little force. If it is black or has light black traces, it means that it contains heavy metal substances such as lead. Otherwise, don't worry. When buying lipstick, put the lipstick sample on the back of your hand, and then rub it with a silver ring. While grinding, observe the color change of lipstick. If lipstick turns black, it means that lipstick contains lead. The deeper the black, the greater the lead content.
Take pH test paper to buy Facial Cleanser
The skin of human body is weak acid. There is a weak acid film on the surface of the skin. If it is damaged, it will make the skin fragile and cause a lot of skin problems, leading to the growth of bacteria in alkaline environment. Therefore, the use of weak acid facial cleanser has a good help to clean the skin. How to detect whether skin cleaning products are alkaline? A pH test paper can solve the problem. Apply a small amount of products on the test paper. If the test paper turns dark green after a few minutes, it indicates that there are too many alkaline components in the material.
Face cream meets fire.
Facial cream is a very important part of our daily care. It provides enough nourishment for the skin and forms a protective film to prevent the evaporation of moisture in the skin. Many products on the market contain a small amount of mineral oil that is allowed to be added internationally. Mineral oil is the product of asphalt after petroleum refining and asphalt refining again. Its function is to lock moisture from the skin surface. However, once the mineral oil exceeds the standard, the oil quality will block the pores, and skin problems such as beans and black spots will emerge one after another.
There are good ways to detect creams. A small amount of cream is placed in a spoon. It can be heated by alcohol lamp or candle. The product that meets the standard will taste like the state of milk boiling, and the taste will not change, and it will be more rich. If there are splashes, smoke, choking smell, and residual oil at the bottom of the ladle after burning out, it means that the mineral oil exceeds the standard or there is boride filling.
Clear water test emulsion
In the course of time, many people used lotion to replace cream in the two season of autumn and summer, but the emulsion often contains a small amount of bitumen ester, which is easy to clog pores and cause dry skin and lack of water.
Test whether it contains oleyl ester, a cup of water can give the results. Pour the appropriate emulsion into the water, such as emulsion floating on the top of the water, prove that the oil containing ester inside it, and then gently shake, if the liquid becomes milky white, that emulsion contains emulsifier, emulsifier is a surfactant, they will damage the skin tissue structure, cause skin sensitivity, and have a strong carcinogenicity. Conversely, if it is poured into the water, the emulsion will sink to the bottom, proving that it does not contain oilstone ester, and consumers can use it safely.
The antioxidant function of iodine wine
Peeled apples will turn yellow when exposed to the air, and iron will rust when exposed to the air for a long time, which is the result of air oxidation. When our skin is exposed to the air, it will also be oxidized. Therefore, recently there has been a saying that anti-oxidation is anti-aging.at present, many products are also emphasizing their anti-oxidation function. Whether the products have such effect or not can be tested with a few drops of iodine.
First, pour some water into a transparent glassware, and drop iodine into the water. The ratio of iodine to water is about 1:50, Shake well, put a little of the products that need to be tested, such as toner, facial cleanser, etc. in it, fully stir. If the product is fully dissolved with the liquid and the water is clear and transparent, it indicates that it has antioxidant function. If the water can not be reduced or becomes black, it proves that the skin will continue to be oxidized by the air after using such skin care products, and the serious oxidation will aggravate.
Cosmetics allergy test
Improper use of cosmetics can lead to allergies, many people have encountered the troubles caused by improper use of cosmetics. In fact, the skin allergy test method for cosmetics is very simple. First, soak a piece of cloth with distilled water or normal saline, screw it to half dry, fold it into four layers, about 1cm square, apply the cosmetics on one side of the cloth, then apply it on the normal skin on the inside of the forearm or back, and then cover it with airtight cellophane or plastic film, and fix it with adhesive tape. After 24-48 hours of observation, if the test site has no symptoms, it indicates that the cosmetic has no irritation to the skin and is relatively safe. If the test site is itchy or burning, it indicates that the cosmetic is irritating to the skin, indicating that the cosmetic must not be used. The test substance should be removed in time and washed with water. One of the methods to distinguish Korean cosmetics is why some Korean cosmetics are not plastic encapsulated?
Answer: this may have something to do with the usage habits of Korean people. After all, counterfeit goods are not so rampant in South Korea as in China. I've been to South Korea's high-end skin care products' Hou 'and' snowflake show '. I found that this kind of high-end skin care products didn't have plastic packaging.
For example, after the scraping sleeping mask, the genuine product is not sealed, open the box and open the lid, and use it directly; the snowflake mask is also unsealed, opening the mask box, inside is 5 mask paste, tear open can be used; in 2014, the new Mamonde flower and herb gel water refreshing sunscreen, directly open the lid can be smeared and so on. So you don't have to suspect that you bought fake cosmetics because the cosmetics you bought are not sealed.
Question 2: why can't I scan Han makeup information with code scanning software?
Answer: the answer given by mobile software experts is that the database may not be updated in time. Mobile phone software scan results can only be used as a reference, and can not be used to directly determine the authenticity of goods, goods are true or false. 'nowadays, mobile phone code scanning software needs to access the database information online, and the database information is not necessarily updated in time. Therefore, some new products, imported products or products sold only in a small range often lack corresponding information due to the limitation of collection scope, so code scanning can not be used as the basis for judging the authenticity of products. If you can't find the product information after scanning the code, you can't judge it as fake blindly. At the same time, the bar code of goods can be copied. If the bar code or two-dimensional code of regular goods is sprayed on the fake and shoddy products, it is not credible to identify the authenticity by scanning the code. "Mobile software expert Mr. Li said. In addition, Mr. Li also reminded the general public not to "swipe at the sight of the code" and to guard against the situation of phone charges being deducted or mobile phone poisoning caused by scanning false information.
Question 3: why isn't the deadline?
Answer: most cosmetics in South Korea are printed with production date, and some are due date.
Unlike domestic cosmetics, Han makeup will have a shelf life printed on it, which generally starts after you open it. The shelf life of cosmetics is 5 years, and that of skin care products is 3 years.
Question 4: must the format of production date be 200X (year), XX (month, expressed in double digits), XX (day, expressed in double digits)? If not, is it a fake?
Answer: the format of production date of most products is 200X (year). XX (month, expressed in double digits). XX (day, expressed in double digits), but it is not absolute. The format of production date of some products is 0x (year) XX (month, expressed in double digits) XX (day, expressed in two digits), some are 0x (year). XX (month, expressed in two digits). XX (day, expressed in two digits), there are more "." in the middle. Even some products produced last year have a production date format of 200X (year).? x (month, 1-9 expressed in one digit, 10-12 is represented by two digits,? Means there is not necessarily one digit).? x (day, 1-9 is represented by one digit, 10-31 is represented by two digits,? Means there is not necessarily one digit).
Therefore, we should not think that the date of production is a fake when there are different expressions.
Is it a fake if the production date is not marked on the bottom of the bottle?
Answer: the production date of most products is marked on the bottom of the bottle, but there are exceptions, which can not be generalized. In addition to some small products that must be marked on the bottle body from the perspective of convenience, there are also some products that could have been marked on the bottom of the bottle (the area of the bottom of the bottle is enough to mark the production date), but they are actually marked on the bottle.
Question 6, about the marking effect of production date, if the number is composed of ink dots, is it fake?
Answer: This is not the feature of distinguishing the true from the false. According to my observation, the production date of most products is composed of ink dots. However, due to the heavy ink and the close distance between ink dots, the production date of some products looks like a solid line, but if you carefully identify the turning part of the number, it is easier to see that it is still composed of dots .
Is it fake that the production date can be removed?
Answer: Here I don't want to say which series of production date is easy to pick out, which series is not easy to pick out. Due to the different dry and wet conditions and the different strength of each person, the conclusion may be misleading. I just want to say that as long as your nails are hard enough, as long as you repeatedly pick, whether the bottle is frosted or smooth, whether the bottle is glass or hard plastic, the ink can be removed. If it can't be removed, it must be integrated with the bottle, but is it possible for you to think about it? Or you will find that some are easy to remove, some are more difficult This is just the difference of adhesion of ink on different smooth surfaces. For example, adhesion on smooth glass may be weaker than that on frosted glass. With the change of dry and wet conditions in storage area, the adhesion of ink will also change. For example, the essence of It&rsquo, s skin, the essence of energy 10, will be dropped by hand. And the production date of genuine piglets can also be deducted, which is not by picking out a production date to identify the true and false.
Question 8: Why are there differences in appearance between some products bought in Hong Kong stores before (n years ago) and the same products bought from Korean stores now?
Answer: in the process of browsing the official websites of Hong Kong and South Korea, I found that the pictures on the official websites of Hong Kong and South Korea are different.
Why are these differences? I think there are several reasons
(1) The pictures of products on the official website of Hong Kong are not updated in time, so if you want to know about the latest products, you still have to take Korean products as the standard. After all, some local cosmetics are Korean enterprises, so the latest products are naturally listed in Korea first.
(2) It is true that the appearance packaging of some products is constantly updated with the passage of time. It is not the same packaging from the launch of this product to now or even in the future. When you come across the launch of new packaging, don't go to the corner, don't think that as long as it is different from the previous packaging, it must be fake.