Cosmetics are in close contact with us at "zero distance", so we should pay more attention to it. Although there are many departments, such as health, industry and commerce, quality supervision, inspection and quarantine of import and export commodities, there are still criminals who are driven by interests and forget their righteousness. How to protect yourself from inferior cosmetics in simple ways? Nana, who has been engaged in cosmetics for many years in the provincial capital, provides some simple methods for consumers to detect the toxicity of cosmetics. The results may not be accurate, but at least let everyone distinguish when choosing cosmetics. ■ Buy facial cleanser and lotion with PH test paper. Human skin is weakly acidic, and there is a weak acid film on the skin surface. If it is destroyed, it will make the skin fragile and cause bacteria to grow in an alkaline environment. Therefore, choosing a weakly acidic facial cleanser is very helpful for cleaning the skin. How to detect whether cleansing products are alkaline? Nana suggested that consumers bring a PH test paper to solve the problem, and smear a small amount of products 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. ■ Clean water test emulsion Many people often use emulsion instead of cream in spring and summer, but some emulsions contain a small amount of oilstone ester, which is easy to block pores, resulting in dry skin and lack of water. Over time, pores will gradually become larger. Check whether there is alkenyl ester, and a glass of water will give the result. Pour an appropriate emulsion into the water, for example, the emulsion floats on the edge of the water to prove that it contains oily resin, and then gently shake it. If the liquid turns milky white, it means that the emulsion contains emulsifier, which is a surfactant, which will destroy the tissue structure of the skin, leading to skin sensitivity and strong carcinogenicity. On the contrary, if it is poured into water and the emulsion sinks to the bottom, it proves that it does not contain oily resin, so consumers can use it with peace of mind. ■ Cream is a very important part of our daily care. Many products on the market contain a small amount of mineral oil that is allowed to be added internationally. Its function is to lock the moisture on the skin surface. However, once the mineral oil exceeds the standard, oil will block pores, and skin problems such as peas and black spots will emerge one after another. When testing cream, take a small amount of cream and put it in a spoon, which can be heated by alcohol lamp or candle. Products that meet the standard will be in the same state as boiled milk, and the taste will not change, and it will be richer. If there is splash, smoke, choking smell and oil residue at the bottom of the spoon after combustion, it means that the mineral oil exceeds the standard or is filled with boride. ■ Silver ring to judge the lead content Nana also introduced an extremely simple method to detect lead. Before using cosmetics, try it on the back of your hand or the root of your ear. These two parts are the most sensitive areas of human perception. After uniform application, gently rub the silver ring (which can also be replaced by other silver products) at the application site. If there are black or light black traces, it means that it contains heavy metals such as lead, otherwise there is no need to worry. ■ Shake to determine the alcohol content of the lotion. Shake the emulsion first and watch the bubbles after shaking. If the bubbles are fine and rich, thick and lasting for a long time, it is a good toner; If there are few bubbles, it means there are few nutrients; If there are many but large bubbles, it means salicylic acid is contained. Salicylic acid has a good cleansing effect, but it is a little irritating. JM who is allergic to salicylic acid or sensitive to skin should try not to use it. If you shake it, many tiny bubbles come out but disappear soon, indicating that it contains alcohol. ■ A glass of water to test the foundation. Put a proper amount of foundation or emulsion into water, and then observe its reaction. Generally, there are three situations: sticking to the side of the cup, floating on the water surface and sinking at the bottom of the cup. These three situations illustrate the components contained in it. Sticking to the edge of the cup is animal oil. Allergies usually occur, so pacifiers and desensitizers will be added during the production process. Sedatives are anesthetics for immune nerves. It will feel good at first, but it will not work after a long time. Floating on the water is mineral oil. Mineral oil is lepton oil extracted from underground oil, which has a good moisturizing effect, but it is airtight, which will affect the permeability of skin and even accelerate skin aging. Heavy metals, lead, mercury, etc. Sink at the bottom of the cup. If you don't stick to the rim of the cup and the bottom of the cup doesn't float or sink, it is a good foundation and can be used with peace of mind.