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Can the hair dye be used for more than half a year after opening it? What should be paid attention to when using hair dye?

2022-12-05 02:02:19 [Materials ] source:iohomedecor.com
Can the hair dye be used for more than half a year after opening it? What should be paid attention to when using hair dye?

Hair dye is one of the items that everyone will use in life. After all, because of the soaring prices, it is not enough to go out and dye your hair casually, so many people will buy hair dye and DIY by themselves. However, because the hair dyes used are different for the length of hair, many people have the remaining situation. Therefore, whether the hair dye can be used for more than half a year after opening has become the most concerned about everyone. Let's take a look.

The hair dye can be used for more than half a year after it is opened

The hair dye must not be used after it is opened for more than half a year. Hair dyes are available in many friends and friends. Since most of the hair dyes sold need to be prepared, they cannot be used for half a year. Generally speaking, the hair dyes should be used within 15 minutes after they are mixed and prepared. Otherwise, the hair dyes should be used up. It will deteriorate and lose the original coloring effect. Hair dye is a cosmetic that dyes hair. Hair dyes generally contain p-phenylenediamine, a carcinogen. In recent years, hair dyeing has become a fashionable choice for people. According to a CCTV international network survey, among the more than 2,600 people surveyed, 90% have dyed their hair. More than half of the respondents who started dyeing their hair before the age of 30 accounted for about half of the respondents.

How long does hair dye last after opening

How long does hair dye last after opening There is no main answer, it depends on the specific situation , Generally speaking, as long as it is sealed, it can be used again, and when it is opened for the first time, whether the hair dye has been in contact with the air for too long, which also determines whether the hair dye can be used again. In fact, it can also be seen by the color. If there is any deterioration, the color of the over-oxidized hair dye will change. As long as there is no discoloration, no lipidation, or separation of water and fat, it can be used again. The above is under the condition that the hair dye has not expired, and the shelf life of the hair dye in the future is best to choose 3 years to see the shelf life, and it can be used within the specified time.

What should be paid attention to when using hair dyes

1. I recommend choosing a good dye cream for hair dyeing, preferably pure natural Ammonia-free hair dye, which will reduce damage to hair and body. 2. Do a skin test before dyeing your hair to see if it will be allergic. If it is allergic skin, don't dye it. 3. When dyeing your hair, check your scalp for wounds and scratches. Finally, pay attention to whether the hair dye has expired. 4. When dyeing hair, try not to touch the scalp when the hair dye is applied, so as to prevent harmful substances from remaining in the pores, which is harmful to the human body. 5. Wash your hair several times after dyeing, try not to leave the smell of hair dye. 6. The hair dye must be kept and put away. Do not distribute it in a place where children can easily get it, and dispose of it if it is not used up. 7. I suggest that you should not dye your hair too frequently, as it is easy to cause damage to your hair and scalp. 8. Do not dye your hair during pregnancy and breastfeeding, it is not good for children and adults. 9. After dyeing the hair, it is recommended not to perm or pull it, otherwise it will affect the effect of dyeing.

(Responsible editor:workmanship)

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