I saw this article on NaturallyCurly.com, after reading about "The Highs and Lows of Porosity" on Au Natural. I thought it was very informative about how hair behaves with water and products.
Achieving Your Personal Porosity Best
The key to working with your hair’s porosity is how you layer your products on wet, clean hair. Those products closest to your naked hair have the most impact.
All porosities can benefit from condition-washing, alternating with the occasional gentle, effective cleanser to clarify. Use one that does not strip hair or neutralize the fatty acids in the hair shaft. Sulfates are not recommended.
Deep conditioning treatments also benefit all degrees of porosity, especially moisturizing ones with good detangling properties. How much they soften, enrich, moisturize and strengthen is the key. Experiment with the level of protein to see what works for you. Proteins help smooth the cuticle by filling in the gaps. The general rule of thumb is the higher the porosity the higher the protein content. The same rule of thumb applies to rinse out conditioners.
Since very porous hair absorbs ingredients faster, heavy silicones and oils on naked wet, clean hair will sink in and bloat the hair. Curlies with higher porosity may want to try henna, cassia, or clay treatments combined with a moisturizing conditioner. These help to smooth and coat the hair shaft and temporarily lower porosity. Do a final rinse with cool water to seal the cuticle. Leave conditioner in; you can even add more after rinsing.
Lower porosity curlies may find a warm water rinse helps to open cuticles for styling product. Leave enough conditioner in to cover and clump, but rinse enough to dilute product and avoid coating. And since your hair holds moisture more efficiently, you may not even need a rinse out conditioner. Try going straight to a leave-in from your co-wash.
Leave-ins and Stylers
Leave-ins and conditioners containing protein help clump curls and minimize frizz in highly porous hair. Protein smooths, but it can also dry, so seal by smoothing or scrunching in a buttery product, emollient or your favorite carrier oil. If your hair is on the lower porosity spectrum, use proteins that can wash off easily, like amino acids. Fine, low porous hair tolerates proteins better than coarse low porous hair. And for low porous hair that’s well moisturized, a light leave in and a good gel may be enough to maintain low-frizz in most dew points.
Porosity is a continuum. Don’t be afraid to experiment and have fun with it.
To read the whole article, please click on this link: http://www.naturallycurly.com/curlreading/curly-hair-care-methods/no-poo/how-does-hair-porosity-affect-your-curls?utm_source=nc_newsletter&utm_medium=email&utm_campaign=20110607