Colorado Cosmetology Written Practice Exam

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Study for the Colorado Cosmetology Written Exam. Test your knowledge with sample questions covering essential topics. Prepare effectively and increase your chances of passing this vital exam!

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What is the primary reducing agent in all acid waves that has a low pH?

Ammonium Thioglycolate
Glyceryl Monothioglycolate (GMTG)
Sodium Hydroxide
Potassium Carbonate

The correct answer is: Ammonium Thioglycolate

The primary reducing agent in all acid waves is ammonium thioglycolate. This compound works effectively at a lower pH, which is essential in creating soft, defined waves in the hair. Ammonium thioglycolate breaks the disulfide bonds in the hair, allowing for the restructuring of the hair shaft into the desired shape during the perming process. The focus on low pH is crucial because it contributes to the gentler nature of acid waves, making them better suited for color-treated or damaged hair. While there are other agents in the options provided, they do not serve the same primary function as ammonium thioglycolate in the context of acid waves. Glyceryl Monothioglycolate is also a reducing agent often used in perm formulations, but it is not as universally recognized as the primary agent in all acid waves. Sodium Hydroxide and Potassium Carbonate, on the other hand, are alkaline and are not used as reducing agents in acid waves, which work best at an acidic pH.