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The previous blog post included information about how oil pre-shampoo treatments work. If your hair is at all porous - even just a tiny, little bit, if it ever gets tangly or poofy or frizzy and seems like it needs weight, if washing it makes it seem to float in the air or if the ends of your hair seem to get wispy and disappear, oil pre-wash treatments can help. Oil pre-wash treatments add flexibility, softness and "weight" to hair. And when you think of "well moisturized" hair, you are referring to a number of qualities, two of which are flexibility and softness. Here's the deal: You know how washing your hands regularly can make them dry or chapped - even if you don't use soap? Washing your hair ultimately dehydrates it too unless your hair is tremendously low porosity. By that I mean the cuticles are un-damaged and in such pristine condition that they don't let water in at all. Porosity is a surface thing. Oils have other great effects like making ...

Managing Elasticity and Porosity: "How To" and a little of the science behind it. Elasticity is a hair character or property that overlaps with porosity. Human hair is elastic - it stretches a little. It stretches a bit more when wet than when dry when it is well cared for. If we over-stretch our hair, it will be damaged. But hair that stretches rather than breaks is a good thing because it's still there to protect our heads. ©Science-y Hair Blog 2014 When hair is dehydrated, it loses it's elasticity, its "stretch." Think of leather or rubber or wood left in the sun and wind for a long time. It becomes dehydrated, loses it's flexibility and becomes brittle. When hair is porous, it loses water more rapidly than is good for it. Hair can be porous because it has been out under the sun a lot, as a result of frequent washing or wetting or lots of brushing, from hair dye or highlights or swimming pools or chemical relaxers or permanent waves or high heat styli...