What factor determines the intensity of a hair color?

The intensity of a hair color primarily relates to the strength of the color's appearance. This refers to how vivid or pronounced the color looks when applied to the hair. Intensity can be influenced by various factors, including the concentration of pigments in the hair dye and how well those pigments penetrate the hair shaft. When choosing a hair color, understanding how intensity works is crucial for achieving the desired visual effect. The more concentrated the pigments in the dye, the more intense the color will appear on the hair, leading to stronger, bolder outcomes.

Other factors mentioned, such as the underlying pigment of the hair, the method of application, and the type of hair product used, play roles in the overall coloring process but do not directly determine the intensity of the final color. Instead, these aspects can influence the overall results or the way the color interacts with the hair but are secondary to the concept of intensity itself.