Have you ever had your hair colored and the results were dull, drab, or the worst too dark?!?! This is a result of the poor porosity of your hair. Which means how your hair absorbs water and hair color. Most importantly, “porosity” in the mind of a hair colorist refers to the integrity of your hair strand’s structure. Your hair was either over processed, you weren’t using weekly conditioning treatments, you weren’t using professional grade shampoo and conditioner, or a combination of all three.