Which factor can affect how hair lifts during coloring?

Hair porosity is a crucial factor that affects how hair lifts during coloring. Porosity refers to the hair’s ability to absorb moisture and color, which is determined by the condition of the hair cuticle.

When hair is more porous, it means that the cuticle layers are either damaged or raised, allowing hair color to penetrate more easily. This increased absorption often leads to a greater lift during the coloring process because the hair can retain the color for a prolonged time and may lift to a lighter shade.

In contrast, hair that is less porous tends to have a tightly closed cuticle, making it more resistant to color absorption. This can limit the effectiveness of the dye and result in less lift, as the color cannot penetrate the hair shaft as readily.

Understanding hair porosity helps cosmetologists predict how a particular hair type will respond to various coloring techniques, enabling them to adjust their practices for optimal results.