Porosity Test

Test the porosity of your hair. In order to test accurately for porosity, use three different areas: front hairline, in front of ears, and near the crown. Grasp small strands of dry hair and comb smoothly. Hold the ends firmly with the thumb and index finger of one hand and slide the fingers of the other hand from the ends towards the scalp. If the fingers do not slide easily, or if the hair ruffles up as your fingers slide down the stand, the hair is porous.

The more ruffles formed, the more porous is the hair. The less ruffles formed, the less porous is the hair. If the fingers slide easily and no ruffles are formed, the cuticle layer lays close to the hair shaft. This type of hair is least porous, is most resistant and will require a longer processing time.