During a tint retouch, what should be avoided?

During a tint retouch, overlapping on previously tinted hair should be avoided because it can lead to uneven color results and possible damage to the hair. When the dye is applied to previously dyed sections, it can lighten those areas excessively, resulting in a color that is more vibrant or differently toned than intended. This can create a harsh line of demarcation between the new growth and the old color, making the retouch look less seamless.

Maintaining the integrity and health of the hair while ensuring a uniform color result is essential during this process. Therefore, it’s best to apply color only to the new growth, allowing the previously colored hair to remain untouched, thus preserving its hue and texture.