Hair Color Formulation

1. Describe the key factors you need to consider when analyzing a client's hair and skin tone before formulating a hair color.

2. Explain the difference between temporary, semi-permanent, demi-permanent, and permanent hair color, and how their chemical compositions affect the hair.

3. A client with naturally dark brown hair wants to achieve a level 7 ash blonde. Outline the steps you would take, including product selection (developer volume, toner, etc.) and precautions.