Redseal Hairstyling License Practice Test

Thio relaxers usually have a pH above what level?

1. 7

2. 8

3. 9

4. 10

The correct answer is: 8

Thio relaxers, which utilize the active ingredient ammonium thioglycolate, typically have a pH level that is above 8. A pH level above this range allows thio relaxers to effectively break down the disulfide bonds in hair, which is essential to the relaxing process. The slightly alkaline nature of the product is what enables it to penetrate the hair shaft and alter its natural curl pattern. At a pH level of 8, the product is strong enough to cause significant changes in hair texture, making it suitable for individuals wishing to achieve a straighter hairstyle. A higher pH, closer to 9 or above, tends to enhance the effectiveness but also increases the potential for damage if not used properly. It is essential for those in hairstyling to understand the chemistry behind these products to ensure their proper application and minimize risks to hair health.