Source: Economic Daily - China Economic Network
Wanting to pursue personality to change the hair color, such as becoming blonde, is indeed fashion-forward. If the original color of the hair is black or brown, then it is difficult to achieve the blonde effect by using hair dye alone. You have to first bleach your hair to achieve the light shades you want.
The best and most professional way to bleach your hair is, of course, in a hairdresser's shop, where experts gather. But there are certainly many friends who will still choose to DIY at home, so do you know about hair bleaching? Let's take a look at it with the Economic Daily - China Economic Network.
How long does it take for hair to be bleached to be dyed?
The first thing you need to understand is that bleaching is not a process that works for everyone. How long bleach stays on your hair depends on many factors, such as your hair color and hair texture.
Blonde: 15 to 20 minutes
Black hair: 30 minutes
Fine hair: 10 to 15 minutes, this type of hair is treated faster because the stratum corneum is thinner
Coarse hair: 30 minutes, this type of hair may require at least two uses
Other factors that affect the duration of bleach use include the color you want and whether your hair has been dyed before.
How does bleach bleach hair?
Bleach dyes hair by opening the stratum corneum of the hair and dissolving the color (melanin), and the longer it is retained, the more keratin on the hair is destroyed.
The two most widely used bleaching agents are ammonia and hydrogen peroxide.
What happens if bleach stays on the hair for too long?
Bleach is not used for a longer period of time, the better the effect, staying on the hair for up to 30 minutes. Beyond this time, the hair is at risk of severe damage.
If the bleach is on the hair for too long
It is possible to lose all pigment and become white: this is because the oxidation process makes the hair white, causing the pigment to be depigrated.
Hair becomes more fragile and unable to retain moisture: Studies have found that hair becomes noticeably weaker after bleaching, and even the skin exposed to bleach is affected. Bleach makes the hair very porous, making it difficult for the hair strands to retain moisture. Excessive porosity and dehydration can lead to damage to the hair shaft and can cause irreversible damage. ”
Hair loses keratin: The last and most serious danger of bleaching is hair losing keratin, a protein that makes up hair. Without keratin, the hair structure is damaged, becomes fragile, and is difficult to set. During the bleaching process, the loss of keratin is difficult to avoid.
Do it yourself before bleaching your hair
Complete the patch test: Do a patch test before you color your hair at home, as you may have allergies you don't know about. Testing the hair beforehand can also determine if the hair is damaged as a result of bleaching.
Read the instructions carefully: Be sure to read the instructions carefully when using bleach and follow the instructions.
Consider your hair type: Some hair types don't stand up to the effects of bleach at all, and straightened or chemically treated hair should be avoided.