Some suggest placing a clean strand of hair into a cup of water and if it floats, then it has low porosity. If the strand sinks, then it has high porosity. This test can be challenging as the products you use can be the variable that make your results inconsistent. See what The Natural Haven has to say about the cup test. Another great means to learning your hair’s porosity is while washing.
If your hair takes a while fully saturate with water before you start washing, then you probably have low porosity hair. It takes my hair 2-3 min. to be fully saturated with water before I wash it so that was an indication that I have low porosity hair. If your hair immediately absorbs the water, then you probably have high porosity hair. Still confused? Here’s another way to observe your hair’s porosity.
If your hair takes hours or days to dry after washing it, then you probably have low porosity hair. If your hair dries in a matter of minutes, then you may have high porosity hair. Do butters leave your hair oily? You probably have low porosity hair. Are lotions and milks not sufficient for maintaining moisture? You probably have high porosity curls and coils.
Important things to note
With the washing and drying test, it is important to consider your hair’s density. If you have very dense hair, then it will naturally take longer to dry, as it is more compact in comparison to low density hair. Also, fine strands tend to not respond well to thicker products in comparison to coarse strands. Still confused? I understand. Sister Scientist recently performed a porosity experiment using household items that you already have. Check it out below--