Current location - Education and Training Encyclopedia - Graduation thesis - Paper on cosmetic chemistry
Paper on cosmetic chemistry
Recently, the report that cosmetics and perfumes contain phthalates, which will harm your health, scared you who love beauty?

In fact, when the medical profession has not proved that phthalates are harmful to health, women can still use them with peace of mind, but to use them healthily, pay attention to some safety matters.

So far, the experimental data made by scientific or medical circles are still not enough to prove that the content of phthalate esters in cosmetics is enough to affect the reproductive health of women's next generation. The Singapore Health Science Bureau also pointed out that so far, no complaints or cases have been received.

On the other hand, cosmetics are all synthetic products. Although they have the function of protecting and beautifying human body, they will emit various harmful substances to stimulate human skin, and some even cause "cosmetic dermatitis" such as skin edema, itching and macula.

To sum up, the harm of cosmetics to women mainly includes the following aspects:

☆ produce allergic reaction.

☆ Cause bacterial skin infection.

☆ Causes dermatitis.

☆ Toxic substances are absorbed into the body, causing chronic poisoning.

☆ Inferior cosmetics produce "phototoxic" reaction in the sun.

Prevent the harm of cosmetics

In order to prevent the harm of cosmetics to human body, we should pay attention to:

Once you find that cosmetics have adverse reactions to the skin, you should stop using them immediately.

① Don't use spoiled cosmetics.

Cosmetics contain fat, protein and other substances, which are easy to deteriorate or be infected by bacteria after a long time. Cosmetics should be fresh, usually used up within 3 to 6 months, and stored in a cool and dry place.

② Don't use inferior cosmetics.

In order to prevent the harm of toxic substances such as mercury and carcinogens in cosmetics, high-quality products recognized by the Ministry of Health should be selected.

③ Prevent allergic reaction.

Before using the new product, do a skin test first, and then use it when there is no redness, itching and other reactions. Once cosmetics are found to have adverse reactions to Baekje skin, they should be stopped immediately.

④ Use different types of cosmetics according to the climate.

Cosmetics with high oil content should be used in cold and dry winter, and cosmetics with high water content should be used in spring, summer and autumn.

⑤ Girls should choose special cosmetics.

Generally, cosmetics such as perfume, powder cake and lipstick are not used.

6 avoid eating cosmetics in the body.

Cosmetics can only be used externally, not eaten in the body. For the sake of prudence, it is best to wipe off lipstick before eating to avoid entering the body with food.

⑦ Remove makeup before going to bed.

Wash the cosmetics off your skin when you sleep, and don't sleep with cosmetics.

Choose the right cosmetics.

If oily skin should choose oil-in-water cream, dry skin should choose oil-in-water grease, and delicate skin should choose cosmetics with little irritation, which is most suitable for children!

Matters needing attention in using perfume

Because all walks of life have not proved that phthalates contained in perfume are harmful to health, women can still use them with peace of mind. However, the following items should be noted when using:

Don't use too much.

Excessive use of perfume will give people bad stimulation. Generally speaking, it is good to smell a faint fragrance within 1 meter. If you can still smell the fragrance within 3 meters, it means too much.

② Don't use it in inappropriate parts.

After the essence and alcohol contained in the perfume are irradiated by sunlight, under the action of ultraviolet rays, it will cause bad stimulation and pigmentation to the skin, so it is best to apply the perfume in a place far away from the sunlight, and do not apply the perfume to the exposed parts. A more appropriate method is to apply some to the collar and skirt and let it evaporate naturally.

③ Keep your body clean.

To make perfume play a charming role, we must first clean our bodies and drive away unclean smells. If the body is not clean and emits an unpleasant smell, not only can the perfume smell not be concealed, but it will be mixed with a more unpleasant smell.

④ Don't mix perfume.

Don't mix different brands, different series and different types of perfumes, so as not to cover up the characteristics of different perfumes and produce bad smells.

⑤ Avoid spicy food.

Garlic, onion, pepper and other irritating foods will produce body odor after eating, which will affect the use effect of perfume.

Precautions in using lipstick

Many women wear lipstick even without makeup. Therefore, lipstick is the most popular cosmetic for women.

The main components of lipstick are lanolin, wax and dye. Because of the complex composition of lanolin, it is easy to cause allergic reactions, such as chapped and peeling lips mucosa, and sometimes itchy lips or slight pain.

In addition, improper use of lipstick will affect health. Because lanolin in lipstick has strong adsorption, it can adsorb dust, bacteria, viruses and some heavy metal ions in the air on the lip mucosa. When people talk, drink water and eat, they will bring lipstick and harmful substances attached to it into their mouths and eat it into their bodies.

Adults should pay special attention not to apply lipstick to children, because children's lips and mucous membranes are more likely to absorb the above harmful substances.

For the sake of health, women should wear lipstick lightly. When you find slight itching and abnormal feeling, wash your lips and stop wearing lipstick.