Hair is made of a protein called keratin. Keratin is also present in the nails. In hair, keratin molecules form straight lines. These bundles are tightly bound together by disulphide bonds. (Di means two, sulphide means containing the element sulfur. These bonds are made up of cysteine, an amino acid.
The cysteine of a keratin molecule forms a disulphide bond with cysteine of another keratin molecule next to it. The more disulphide bonds there are, the straighter the hair is.
What is hair straightening?
When straightening hair, people use a substance called ammonium thioglycolate. This is also the substance used to straighten hair curling hair.
Amonium thioglycolate contains a thiol group (-SH) that can break disulphide bonds through a chemical process. When the disulphide bond is broken, the connected keratin bundles in the hair will unravel. Your hair will definitely be weak.
During the straightening process, the hairdresser will wash your hair and then apply this substance for a short time.
The salt will do its job and “loose” the hair.
Afterwards, when disulphide bonds, the hair will be straightened with hot irons.
After straightening the hair will be strengthened (permed) to maintain the permanent (straight) hairstyle.
To do that an oxidizing agent containing hydrogen peroxide to reestablish disulphide bonds will be applied up your hair again. And now you have straight hair.
Sthe differencebetween straightening your hair and curling your hair?
Hair perming also goes through a similar process using ammonium thioglycolate. The difference occurs after the hair has been washed of chemicals. At that time, instead of straightening the hair, it will be curled with a tool and then “stamped” with an oxidizing compound.
Is this the same as like keratin treatment is it?
No. Keratin treatment is actually a therapy to fill the gaps between disulphide bonds with keratin instead of breaking them down. When you apply keratin to the hair cuticle, you can reduce hair frizz and stiffness by about 95%. Keratin treatment causes little damage to hair. It makes your hair shiny and healthy. But the effect only lasts 4-5 months.
Is hair straightening safe for hair is ?
Actually no. In fact it can make you bald if done too often and incorrectly. It can also damage your hair for life.
For example, straightening your hair exposes your hair to chemicals and dryers that can dry out your roots. This makes hair very susceptible to breakage, leading to hair loss. That’s why it’s always a good idea to straighten your hair at a reputable facility.
Hair can also become burned or damaged with split ends. Some people complain of hair falling out in clumps after straightening their hair.
If you continue to dry your hair or over-dry it, this can lead to permanent hair loss. You may also be allergic to chemicals that cause itching and blisters on your scalp. That’s why before straightening your hair you need to be aware of all the possible side effects.
The difference between hair straightening and hair straightening
Hair straightening also uses the same technique to break and change disulphide bonds. But hair straightening is not permanent it only lasts two or three months. Hair straightening also uses ammonium thioglycolate but at a higher pH and concentration than in permanent straightening.
Hair straightening can also cause irritation and many other unpleasant side effects like straightening hair.
Cam Tu
According to Asiaone</ i>
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