Final answer:
Chemical hair relaxing can be performed using the thio method or the sodium hydroxide method, both of which alter the hair's disulfide bonds to relax its texture.
Step-by-step explanation:
The two commonly used methods of chemical hair relaxing are the thio method and the sodium hydroxide method. The thio method utilizes chemicals like ammonium thioglycolate to break and reform the disulfide bonds in hair, thereby relaxing it. The sodium hydroxide method, also known as lye or caustic soda, works by breaking down these bonds more permanently, leading to a straighter hair texture. This method is more aggressive than the thio method and requires careful application to prevent hair and scalp damage.
The two commonly used methods of chemical hair relaxing are the thio method and the Sodium hydroxide method. In the thio method, a chemical compound called thioglycolic acid is used to break the disulfide bonds in the hair, allowing the hair to be reshaped. In the sodium hydroxide method, sodium hydroxide (also known as lye or caustic soda) is used to break the hair bonds and straighten the hair.