To remove redness from hair, use a lightener to remove the main undertones. Follow with a blue-based toning shampoo to neutralize any remaining brassy undertones.
- Mix up a lightener formula
Mix equal parts hair bleach, 10 volume developer, shampoo and water in a plastic bowl to make a lightener formula.
- Apply the lightener
Use a color brush to apply the lightener to the hair. While wearing protective gloves, apply the lightener to the mid-shaft. Work the lightener into the hair to create lather.
- Process the lightener
Let the lightener process for 10 minutes. Once the hair turns lighter, work the mixture into the rest of the hair.
- Rinse out the lightener
Wet the hair, and work the lightener into a lather. Rinse the hair with tepid water until it runs clean. Towel dry the hair.
- Make a toning shampoo
Orange undertones typically remain after using a lightener. Make a blue-based shampoo by adding a pea-sized drop of blue food coloring to a portion of the lightener. Apply the shampoo. If the redness still shows, add green coloring to the mix.
- Work the shampoo, and rinse thoroughly
While wearing gloves, work the shampoo into the hair strands. Let the shampoo stand for five minutes, and rinse it out thoroughly. Follow with a gentle shampoo and deep conditioner.