Chemical hair straightening


Chemical hair straightening is the most effective straightening. It changes the structure of hair, destroying the sulfur bond inside each hair but not violating the hair itself. 

The following chemicals are used in chemical hair straightening:



1 chemical product

Sodium hydroxide is used when the hair is very curly. It’s an aggressive chemical means and a strong alkali. It penetrates deep inside your hair, softens it, increases hair volume and straightens it. At the same time it is violating hair. Despite its high efficiency and relative inexpensiveness, more solid beauty salons refuse to use it because of the negative impact on hair. Hair restoration and treatment after the procedure is a must.


2 chemical product

Ammoniumthioglycolate is used for wavy hair but it’s not valid for very curly hair. This means is of medium strength and it may not straighten hair perfectly.  Nevertheless, it will make it more obedient. It affects hair gently. It is relatively expensive, so it is used only in high-quality products.


3 chemical product

Guanidine hydroxide effects hair in a moderate way and really dries your hair. It is non-alkaline. After the procedure, there is a need to restore the water-lipid balance in your hair.


4 chemical product

Ammonium (diammonium) sulfide has a weak affect. It is used for heavilydamaged, color-treated, weakhair. It does not straighten very curly hair. 


5 chemical product

Cysteamine hydrochloride triethanolamine gives weakstraightening impact to your hair.



Chemical straightening effects last for a very long time, until hair regrows, or 6-9 months.


The long-term chemical straightening requires "sacrifice". Even the most harmless chemistry affects the natural structure of hair, which means it can be violated. Here comes simple mathematics: the more chemicals that are used or the more aggressive they are, the better result is achieved (straighter hair), but the more chemical damage is done to your hair and the more difficult it is to revive it. No professional can tell you in advance exactly how chemicals may affect your hair. One thing is clear – cardinal changing of your hair structure can’t be totally harmless. Therefore, before deciding to use chemical hair straightening, you should think twice if it is worth doing it.


Lately, the following tendency has been noticed. Even though chemical straightening is relatively cheaper, it has become less popular because more and more women choose other means of hair straightening that are healthier to their hair.  





  • For permed, bio-curled or chemically dyed hair (6 months before straightening).
  • For weak, thin and breaking hair.
  • For sensitive and damaged scalps.
  • During pregnancy and breastfeeding.


More related articles:

6 more methods for hair straightening

Brazilian hair straightening

9 steps procedure of permanent straightening


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