Dyeing coffee and golden brown are full of fashion temperament. Even if the dyeing is uneven or some are not dyed, these two colors can effectively help keep out white hair.

2. brown

Brown can cover white hair without exaggeration, and it is slightly dark red, which is a very good sunshine color.

3. Dark brown

Dark brown is an extremely whitening hair color, which not only makes you look very young and delicate, but also highlights your social butterfly temperament.

4. Black

Black is a hair color suitable for any skin color, not too noisy and prominent, and it is also a relatively low-key color. The most important thing is that it can cover the white hair well.

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Hazards of hair dyeing:

Secondary amine can easily react with epoxy, aldehyde and acid gas, and can be used as dye fixing agent to stabilize the adhesion effect of dyes. It can penetrate into skin and hair and stay for weeks, months or even years, and react with tobacco smoke or waste gas in the air to generate nitrosamines, which are a strong carcinogenic chemical.

It is reported that hair dyes are associated with a series of cancers, including breast cancer, bladder cancer, uterine cancer, brain cancer and leukemia. As early as 2009, a woman in Britain was at risk of blood cancer because she used hair dye more than 9 times in a year. A year later, the European Commission banned 22 hair dye products that may cause bladder cancer.

Hair dyes also contain heavy metal salts. Once it enters the human body, it is difficult to excrete it. If it accumulates in the body for a long time, it will cause poisoning, dizziness, headache, fatigue, numbness of limbs and other poisoning symptoms, and may enter the liver, kidney and brain, destroying the functions of these organs.

Experts advise you not to dye your hair. If you need to dye your hair, the interval between dyeing your hair should be at least 3 months, preferably in a professional barber shop. Do not bake oil one week before dyeing, and do not wash your hair on the day of dyeing. The oil secreted by scalp has protective effect; If the scalp has a wound ulceration, it is not suitable for dyeing hair.

Do a skin allergy test 48 hours before dyeing hair; Before dyeing hair, you can apply emulsion or vaseline to the hairline and behind the ears to prevent the hair dye from contacting the skin and causing damage. If the scalp has slight adverse reaction when dyeing hair, it should be stopped immediately.

If you wait in a smoky environment for a long time after dyeing your hair, you should wash your hair frequently and remove the harmful substances adsorbed on your hair in time. It's best to wear a hat when traveling in foggy days, and take off your coat immediately after entering the house to reduce the harm of dirty outdoor air to your body.

2, reduce the harm

1. Dye your hair at most twice a year.

2. It is best to be at least 1-2 cm away from the scalp.

3. After dyeing your hair, wash it thoroughly and wash off all the dyed substances.

4. Don't scratch your scalp after dyeing your hair, it's easy to get infected.

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