Rhode Island Barbering Practice Exam

Hydrogen peroxide is commonly used in hair dyeing to provide lighter shades or "lift" to the hair. This process is known as high-lift color and requires a higher volume of hydrogen peroxide. Since the options are measured in volume, it is important to choose the highest option which is 40. Options B, C, and D are all lower volume levels and would not provide maximum lift in one step. Therefore, the most accurate answer is A.