Why isn't my hair taking in color?

Hair has different types of porosity. Porosity is the amount of moisture that the hair is able to absorb.

There are a lot of factors that affects the porosity of the hair such as hair colors, perms, relaxers and other things.

The more the hair is expose to these factors affects the overall porosity of the hair.

The Porosity are Resistant porosity, normal, or extreme.

Extreme porosity will relate to damaged hair that are unable to take color very well or it will fade faster or often. That means that the cuticle is missing and the hair is badly damaged.