Which hair texture tends to process slightly lighter than the intended level?

Fine hair tends to process slightly lighter than the intended level due to its structure. Fine hair has a smaller diameter and less melanin (natural pigment), making it more porous. This increased porosity allows chemical products, such as hair color, to penetrate more quickly and deeply, which can result in the hair lifting and achieving a lighter shade than anticipated.

Coarse hair, on the other hand, has a larger diameter, thicker cuticle layers, and is generally more resistant to chemical processing. As a result, it does not lighten as readily as fine hair and often requires more time or higher volumes of developer to achieve the desired color. This characteristic contrasts with what is observed in finer textures, where the processing time and application may need to be adjusted to avoid over-lightening.

Understanding the behavior of different hair textures during processing is crucial for achieving the desired results in hair coloring and other chemical services.