1, prepare a glass of water (pure water, not the kind with minerals added).
2. prepare a PH test paper (available in a beautiful DIY shop, 80 books, about two yuan).
3, wash your face with water, without any skin care products.
4. Here are the steps. First tear off a test paper, soak it in clear water, then stick it on your face, take it off after five seconds, and compare it with the colored strips in the test paper book to measure the PH value of your skin.
After measuring the PH value of your skin, you can choose the skin care products that suit you. Generally speaking, if the PH value is between 5-6, it means that your skin is healthy. Just choose skin care products close to this PH value. If your test result is below 5, it means that your skin is too acidic and you need to choose weakly alkaline skin care products to balance it. Similarly, if your skin PH is greater than 6, it is alkaline skin. At this time, it is necessary to supplement acid properly and use acidic skin care products to synthesize it. Traditional ideas exclude alkaline skin care products. In fact, it is misleading us, and it is also the "life" column of that issue. Some experts criticized and corrected this view. Because the skin is more prone to various conditions in an acidic state. The main state of peracid skin is:
1, the skin is slack, dull, inelastic and prone to edema;
2, sensitive, the stratum corneum is thin and easy to oxidize;
3, easy to grow acne, acne, eczema;
4, easy to grow spots, easy to get sunburned.
If the alkalinity is too strong, the skin will be chapped and peeled, and it is not easy to absorb skin care products, and the resistance to bacteria will decrease, which is prone to folliculitis, infection and acne.
Too much acid and too much alkali are equally terrible. Don't blindly follow the trend and blindly believe in acidic skin care products. Especially for things like facial cleanser, generally speaking, weak alkali has better ability to remove dirt, as long as it does not contain soap base, under normal circumstances, weak alkali will not harm the skin. Because, when the skin surface is stimulated by alkaline substances to change the pH value, the acidic fat film of the skin also has the ability to adjust the pH value of the skin surface back to the original state in a short time. In addition, this is true not only for skin care products, but also for food, because under normal circumstances, the PH value of the body should be maintained between 7.3 and 7.4, which is alkaline. If the PH value of the body is lower than 7.3 for a long time, it will form an acidic constitution and make the body in a sub-health state. If this situation is not corrected in time, human health will be seriously damaged, which will lead to various diseases. So don't blindly think that eating more acidic food will be good for your skin.
Hehe, in fact, this method can also be applied to many places, not only to test skin care products, but also to test detergent. Generally speaking, the detergent with PH value of 5-6 is the best, so that we can choose the detergent that really doesn't hurt our hands. There is also shampoo, but the requirements for shampoo are not entirely so. Shampoo generally emphasizes its decontamination ability, so.
The pH value indicates the PH value of the object. The range is from 0 to 14, generally from 0 to 7 is acidic, from 7 to 14 is alkaline, and around 7 is neutral. The smaller the PH value, the greater the acidity, the greater the PH value and the greater the alkalinity.
Generally, the pH value of healthy skin is between 5.0 and 5.6 (fluctuating, not fixed), showing weak acidity. Therefore, skin care products are also weakly acidic, which is suitable for the pH of our skin. Facial cleanser and the like are often weakly alkaline, but their ability to clean oil is relatively strong, so people with oily skin often use it, and people with dry skin feel very dry after using it. On the one hand, alkalinity may irritate the skin a little, on the other hand, it also takes away too much oil.
My personal opinion is that skin care should use weak acid, wash your face and the like, depending on your skin properties. It is best not to use more than 8, and low pH value is not desirable.
If the PH value is too high, it will easily lead to skin aging, and if it is too low, it will easily cause skin sensitivity, preferably between 5.5 and 7. Of course, oily skin can choose a slightly higher ph value, but as the previous sister said, below 8 is also more suitable! The ph value of tears is around 5.5, which is better for normal and healthy skin!