Let’s look at the difference between Brazilian keratin hair straightening and chemical straightening method. The first thing we have to do is to understand the technology of chemical hair straightening and compare it with the technology of keratin hair straightening.
Chemical hair straightening is permanent. It means that it straightens even the curliest hair once and forever.
Chemical hair straightening is based on the use of chemical compounds that contain sodium hydroxide or ammonium thioglycolate. Both components are quite aggressive, especially - sodium hydroxide. This agent that has a reasonably aggressive alkaline nature penetrates deep into the hair, makes it soft, silky, and absolutely straight.
Ammonium thioglycolate is a less aggressive agent, but it also may lead to serious hair damage. Chemicals used in hair straightening break protein bonds inside of the hair, so it becomes softer and weaker. That is how chemical hair straightening acts.
Chemical hair straightening must be performed considering the safety precautions. The time during which the chemical agent is on your hair must be controlled strictly, and at the end of the procedure, it should be washed carefully. Chemical straightening dries the hair significantly. That is why specialists don’t recommend using it on bleached and streaked hair, as well as on hair after chemical curling.
Unlike the methods as mentioned earlier, keratin hair straightening procedure is opposite in its mechanics to chemical straightening procedure. The agent used in keratin hair straightening does not contain aggressive chemical compounds. It consists only of natural ingredients, including keratin (the main hair protein).