How does hair porosity affect hair coloring?

Hair porosity refers to the hair's ability to absorb and retain moisture, which significantly impacts the coloring process. High porosity hair, which has a more open cuticle structure, can absorb color more quickly but may also result in uneven or faded color due to excessive absorption. Conversely, low porosity hair, with tightly sealed cuticles, may resist color penetration, requiring more time or heat to achieve the desired shade. Understanding porosity helps in selecting the right coloring techniques and products for optimal results.