Missouri Board of Cosmetology Practice Exam

Permanent color achieves both lightening and depositing color because it contains a developer that helps to open the cuticle and lift the natural color, while depositing new color molecules into the hair shaft. Option A is incorrect because staining the cuticle is typically associated with temporary or semi-permanent color formulas. Option B is incorrect because permanent color is designed to lighten and deposit color, not just deepen the tone. Option D is incorrect because the use of a developer in permanent color helps the color molecules to penetrate deeper into the hair shaft, providing longer-lasting results that do not fade with each shampoo.