Which can be a sign of over-processing hair during chemical treatments?

Brittleness and breakage are definitive indicators of over-processing hair during chemical treatments. When hair undergoes chemical processes such as coloring, perming, or relaxing, the structure of the hair's protein bonds can be weakened if these treatments are either too strong or used too frequently. This weakening can lead to a loss of elasticity, making the hair become fragile and more prone to breaking.

In contrast, increased shine and manageability, enhanced curl definition, and rich color saturation are typically positive outcomes of hair treatments when done correctly. These results indicate that the hair has been well-conditioned and properly treated, thus maintaining its integrity and health. Over-processing, however, disrupts this balance, leading to the adverse effects represented by brittleness and breakage. This underscores the critical need for careful monitoring and adherence to recommended treatment guidelines to maintain hair health.