Hairdresser use porosity to gage the hair's capacity to ingest dampness. The fingernail skin in ordinary, sound hair is minimized so it prevents dampness from panetrating the hair shaft. In any case, when the cuticle is extremely smaller and prevents dampness from panetrating the hair shaft, we say that the hair has low porosity. It is hard to apply compound administrations on low-permeable hair and, frequently, the hair must be mollified before such administrations are done. Interestingly, hair with high porosity assimilates dampness very promptly and care must be taken to guarantee the hair isn't harmed amid any substance treatment.