New Mexico Cosmetology Practice Exam 2024 - Free Cosmetology Practice Questions and Study Guide.

Alkaline waves are hair treatments used to straighten curly or wavy hair. They contain chemicals that break down the bonds in the hair, making it more malleable and able to be molded into a straight shape. The pH range of Alkaline waves is important because it determines how strong the chemical solution is and how long it will take for the hair to be straightened. A pH range of 9.0-9.6 is considered ideal for alkaline waves because it provides the best balance between breaking down the hair bonds and not causing excessive damage to the hair. Choices A, B, and C all have lower pH ranges, which means they are not alkaline enough and might not be able to properly straighten the hair. Option A has a pH range that is slightly acidic, which can cause damage to the hair. Option B is a neutral pH, which is not strong enough to break down the hair bonds effectively. Option C is slightly alkaline but still not as strong as option D, meaning it might take longer to straighten the hair. Therefore, the correct answer is D 9.0-9.6.