How to test skin care products

There are many types of skin care products on the market, and most of them are sold under the slogan of being pure natural. In fact, these are just a marketing method of some businesses, and the effects are not as good as they advertise. As an ordinary consumer, it is generally difficult to identify the quality of skin care products, and it is impossible to test every skin care product. So how to test skin care products?

How to test skin care products

How to judge the lead content in silver ring

Before using a cosmetic, try it on the back of your hand or the base of your ear. These two parts are the most sensitive areas of the human body. After applying it evenly, rub a silver ring at hand (other silver products can also be used as a substitute) on the applied area with a little force. If it turns black or has light black marks, it means that it contains heavy metal substances such as lead. Otherwise, there is no need to worry. When buying lipstick, apply the lipstick sample on the back of your hand, then rub it with a silver ring, and observe the color changes of the lipstick while rubbing. If the lipstick turns black, it means that it contains lead. The darker the black, the greater the lead content.

Bring PH test paper to buy facial cleanser

The human skin is weakly acidic and there is a weak acid film on the surface of the skin. If it is damaged, the skin will become fragile, causing many skin problems and causing bacteria to grow in the alkaline environment. Therefore, choosing a weak acid facial cleanser is very helpful for cleaning the skin. How to detect whether a cleansing product is alkaline? A piece of pH test paper can solve the problem. Apply a small amount of product on the test paper. If the test paper turns dark green after a few minutes, it means that there are too many alkaline components in the substance.

The pros and cons of face cream when exposed to fire

Facial cream is a very important part of our daily care. It provides sufficient nutrition to 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, which is allowed to be added internationally. Mineral oil is the product of asphalt produced after petroleum refining and asphalt refining again. Its function is to lock moisture from the skin surface, but once the mineral oil exceeds the standard, the oil will clog the pores, and skin problems such as pimples and dark spots will emerge in an endless stream.

There are also good ways to test face creams. Take a small amount of cream and put it on a spoon. You can heat it with an alcohol lamp or candle. Products that meet the standards will be like boiled milk, the taste will not change, and it will be more intense. If there is splashing, thick smoke, and a pungent smell during combustion, or there is oil residue at the bottom of the spoon after burning, it means that the mineral oil exceeds the standard or is filled with borides.

Water test lotion

In autumn and summer, many people often use lotion instead of facial cream, but lotion often contains a small amount of oleate, which can easily clog pores, causing dry and dehydrated skin. Over time, the pores will gradually become larger.

To test whether oleate is present, a cup of water is enough to get the result. Pour an appropriate lotion into water. If the lotion floats on the water, it proves that it contains oleyl ester. Then shake it gently. If the liquid turns milky white, it means that the lotion contains emulsifier. Emulsifier is a kind of surfactant. They will destroy the skin's tissue structure, cause skin sensitivity, and are highly carcinogenic. On the contrary, if the emulsion sinks to the bottom when poured into water, it proves that it does not contain oleyl ester and consumers can use it with confidence.

Iodine tincture to distinguish antioxidant function

A peeled apple exposed to the air will turn yellow, and iron will rust if exposed to the air for a long time. These are all the results of oxidation by air. Our skin is also oxidized when exposed to air. Therefore, there is a saying recently that anti-oxidation means anti-aging. Currently, many products also emphasize their antioxidant function. To test whether the products have such effects, a few drops of iodine can help.

First, pour some clean water into a transparent glass container and drop some iodine into the water. The ratio of iodine to water is about 1:50. Shake well and put a little of the product to be tested, such as toner, facial cleanser, etc. in it. Stir well. If the product is fully dissolved in the liquid and the water becomes clear again, it means that it has antioxidant function. If the water cannot be restored or turns black, it proves that the skin will continue to be oxidized by the air after using such skin care products, and the oxidation will be aggravated in severe cases.

Cosmetic Allergy Test

Improper use of cosmetics can cause allergies. Many people have experienced the troubles caused by improper use of cosmetics. In fact, the method for skin allergy test of cosmetics is very simple. First, soak a piece of cloth with distilled water or saline, wring it until half dry, and fold it into 4 layers of about 1 cm square. Apply cosmetics on one side of the cloth, and then apply it on the inner forearm or normal skin on the back, then cover it with airtight cellophane or plastic film and fix it with tape. After 24 to 48 hours of observation, if there are no symptoms at the test site, it indicates that the cosmetics are non-irritating to the skin and are relatively safe. If the test site is severely itchy or burning, it indicates that the cosmetic is irritating to the skin. It is suggested that the cosmetic must not be used. The test substance should be removed promptly and rinsed with clean water.