Hair Analysis for Porosity:
You can check porosity on dry hair by taking a strand of several hairs from four different areas of the head (the front hairline, the temple, the crown, and the nape).
Hold the strand securely with one hand while sliding the thumb and forefinger of the other hand from the end of the scalp.
If the hair feels smooth and the cuticle is compact, dense, and hard, it is considered resistant.
If you can feel a slight roughness, it is considered porous.
If the hair feels very rough, dry, or breaks, it is considered overly porous.
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