2. After applying white vinegar and glycerin, be sure to clean it. Although many whitening creams contain glycerol, the content is not much.
3, can play a role in locking moisture. But white vinegar is an acidic substance and an irritating product.
Even if glycerin is not washed off with clear water, it will not have much influence on our skin, but if white vinegar is not washed off, it will irritate the skin if it is left on the face for a long time. Let our skin become sensitive and fragile, so we should wash our face after each rubbing, and then carry out normal skin care after washing our face.
White vinegar and glycerin are not like the skin care products we use every day. It is not recommended that you use it every day. Because white vinegar contains a lot of acidic substances, long-term use will destroy the stratum corneum of our face. Once the cuticle of the face is destroyed, the skin will become very insensitive. So frequent use is the right choice!
6, I suggest you use it no more than twice a week, and the effect of eager whitening is even worse.
7. Although white vinegar and glycerin are good, they are not suitable for everyone. Especially for people with sensitive skin, apply it under the armpits or ears before use, and then apply it to the whole face when there are no allergic symptoms, just in case.
8. Try to use it at night, not during the day. Because glycerin may have some chemical reactions when applied to light during the day, it will make the skin dark yellow. In addition, glycerol is sticky, and it is easy to adsorb some dirt, which will block pores. So it is recommended to use it at night.
Extended data:
1, stored in a clean and dry place. Pay attention to sealed storage. Pay attention to moisture-proof, waterproof and heat-proof, and do not mix with strong oxidant. It can be stored in tin-plated or stainless steel containers.
2. Store in an aluminum barrel or galvanized iron barrel or tin can lined with phenolic resin. Storage and transportation should be moisture-proof, heat-proof and waterproof. It is forbidden to mix glycerol with strong oxidants such as nitric acid and potassium permanganate. Store and transport flammable chemicals according to the general regulations.
3. Production methods: The industrial production methods of glycerol can be divided into two categories: the method using natural oils as raw materials, and the obtained glycerol is called natural glycerol; Glycerol obtained by synthesis with propylene as raw material is called synthetic glycerol.
4. Natural glycerol:
Before (1) and (1984), glycerol was completely recovered from the by-products of soap made from animal and vegetable oils. Up to now, natural oils and fats are still the main raw materials for producing glycerol, of which about 42% comes from homemade soap by-products and 58% comes from fatty acid production.
(2) Saponification reaction of oil in manufacturing industry. Saponification reaction products are divided into two layers: the upper layer mainly contains fatty acid sodium salt (soap) and a small amount of glycerol, and the lower layer is waste lye, which is a dilute glycerol solution containing salts and sodium hydroxide, generally containing 9- 16% glycerol and 8-20% inorganic salts. Oil reaction.
(3) The glycerol content of glycerol water (also called sweet water) obtained by oil hydrolysis is higher than that of soap-making waste liquid, about 14-20%, and inorganic salt is 0-0.2%. In recent years, continuous high-pressure hydrolysis has been widely used, and no catalyst is used in the reaction. The obtained sweet water generally does not contain inorganic acid, and the purification method is simpler than that of waste lye.
(4) Both the soap-making waste liquid and the glycerol obtained by oil hydrolysis contain low glycerol content and various impurities. The production process of natural glycerol includes purification and concentration to obtain crude glycerol, and the refining process of distillation, decoloration and deodorization of crude glycerol.
5. Synthesis of glycerol: There are two methods to synthesize glycerol from propylene, chlorination and oxidation. At present, propylene chlorination and propylene irregular acetic acid oxidation are still used in industry.
6, white vinegar beauty method:
(1), put a small basin of water and add a small amount of white vinegar (about two spoonfuls) every time you wash your face.
(2) Pour it into water, stir it, throw it on your face, or soak it directly in warm water. Then pour out the water and start the normal cleaning procedure.
(3) White vinegar can relieve wrinkles: After washing your face at night, mix 1 spoon vinegar with 3 spoonfuls of water, dip it in a cotton ball, gently rub the wrinkles on your face, and then massage your face with your fingertips. This method helps to eliminate small wrinkles on the face.
(4) White vinegar rejuvenation: Wash your face and hands first, then soak them in warm water with vinegar, and rinse them with clear water after 5 minutes. Doing this for a long time can make your skin clean and delicate, and the amount of vinegar in the water should be less, so that the water color will not become the standard.
(5) White vinegar to remove spots and lighten spots: the traditional Chinese medicine Atractylodes macrocephala is mashed into white vinegar, blended moderately, and sealed for one week. After washing your face every day, clean up the freckles, which will gradually disappear and fade over time.
(6) White vinegar to relieve fatigue: When taking a bath in the bathtub, add 1-2 tablespoons vinegar to warm water. After taking a bath, it can not only remove the aged cuticle of the skin, but also eliminate fatigue, make your face radiant and look rosy.
(7) White vinegar can also inhibit dandruff: Before going to bed every night, add water to the dandruff growth area with 1: 1 vinegar, gently rub the hair roots, and wash with clean water after 10 minutes. This can inhibit the formation of dandruff and eventually cure it. Washing your hair with warm water and vinegar is also very effective.
(8) White vinegar hairdressing: After shampooing with neutral shampoo, rinse your hair with warm water and a little vinegar, and then rinse it with clear water after 20 minutes. Slowly, the hair will become soft and shiny, black and bright.
(9) White vinegar rejuvenation: White vinegar and water can be put into mineral water bottles according to the ratio of 1:3 respectively. After washing your face every morning and evening, gently pat the white vinegar water on your face with your palm, not too much at a time, just a little. You are soaked to the skin. You can wash your face with this water occasionally.
Baidu encyclopedia-white vinegar
Baidu Encyclopedia-Glycerol (Glycerol)