Hair is composed of many keratins (proteins), which are mainly composed of hydrogen bonds, salt bonds and disulfide bonds, and long chain polypeptide bonds that maintain alignment.
All hair contains millions of disulfide bonds, which give it structure, strength and stability. When all the bonds, especially the disulfide bonds, are intact and aligned, you will have healthy, beautiful, shiny, smooth hair.
It is natural that when disulfide bonds are broken, damage will result.
Hair is damaged every day through various degrees of damage. Those that cause you split ends, curls, dullness, dry hair color, thinning and frizzy hair may be related to broken disulfide bonds.
So if possible, try to do it in the front, middle and back. As long as you can intersperse hair care opportunities, you must do a good job of hair care with different functions.
1. Repair before dyeing
Help you wrap up the damaged hair cuticles to prevent the hair cuticles from being severely eroded and weakened by the dye during the hair dyeing process.
2. Repair during dyeing
This is also the most important part of the hair care process! !
Hair of all types (natural, curly, fine, straight, etc.) derives most of its integrity from healthy, correctly paired disulfide bonds.
When hair is damaged by thermal, chemical, mechanical or environmental factors, these disulfide bonds break, forming a single sulfur-hydrogen bond.
After the disulfide bond is broken, two reactions may occur:
first reaction
A single hydrogen sulfide component is paired with a single oxygen molecule; this is a perfect match and causes no further damage.
second reaction
This is the key point that causes hair damage; one hydrogen sulfide molecule pairs with three oxygen molecules to form Sulfur trioxide [SO3], the so-called sulfite. The protonated sulfate is called cysteine, which then eats the protein out of the hair.
When sulfur trioxide reacts with water, it produces what is known as sulfuric acid. Sulfuric acid can cause burns to the skin, eyes, lungs, and digestive tract. Exposure to large amounts can even lead to death in severe cases.
That’s why we often call out that hair dyeing is a very dangerous job, so don’t ignore it!
In the case of chemical services, good hair care products like my most used [OLAPLEX], the working principle is to pair up with a single sulfur hydrogen bond faster than those three damn oxygen molecules, so as not to be converted into sulfur trioxide SO3.
3. Repair after dyeing
Porous hair is formed after chemical treatment. Immediate repair and repair after dyeing can extend the stability of the pigment particles and prevent excessive loss of artificially filled pigment particles due to subsequent daily shampooing and various damages. Quickly, rapid depigmentation occurs.
As for the subsequent daily basic color protection and repair, we will discuss it next time.
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