What is the purpose of using heat during a keratin treatment?

Using heat during a keratin treatment serves the critical function of activating and bonding the keratin to the hair. The application of heat helps to open the hair cuticles, allowing the keratin molecules to penetrate deeply into the hair shaft. This process enhances the treatment's effectiveness by ensuring that the keratin adheres properly, resulting in smoother, shinier, and more manageable hair. The heat not only facilitates the infusion of keratin into the hair but also helps in sealing it, providing long-lasting results.

Other options do not align with the primary purpose of heat in this specific context. For instance, while drying the hair's surface is an aspect of some hair treatments, it is not the primary goal of keratin treatments. Cooling the scalp and lightening hair color are unrelated to the keratin treatment process, as these actions would not contribute to the overall objective of smoothing and enriching the hair's health and appearance through keratin infusion.