When preparing a hair color formula it is important to first establish what the natural hair color level is. The natural level can easily be determined by consulting the swatch book provided by your hair color manufacturer. Once you have become familiar with the hair coloring process, you will be able to determine the natural level by eye.
Pay careful attention to observe the client’s full head of hair as the hair may be darker towards the rear of your clients head, and lighter on the top of your clients head.