Final answer:
Lightening the ends of the hair is not typically performed during a hair color retouch service; the goal is to address new growth and match the existing hair color for a cohesive look.
Step-by-step explanation:
Among the procedures listed for a hair color retouch service, the one that is not typically performed is lightening the ends of the hair. This process is not a standard part of a retouch service, which primarily focuses on addressing new growth to match the existing color. The usual steps of a retouch include:
- Applying color to new growth to ensure that the hair appears even and there is no discrepancy between the roots and the ends.
- Blending color to match the existing hair shade to create a seamless look from root to tip.
- Applying a conditioning treatment after coloring to help moisturize and protect the hair after the chemical process.
It is important to remember that permanent hair coloring chemically alters the structure of the hair, while semi-permanent hair color washes out gradually and is less likely to create a stark contrast with new growth.