sade087

It's fairly common to have hair that is porous on the ends, but not at the roots. That means different parts or your hair require rather different care. How easily your hair becomes porous with just normal wear and tear and weathering depends on a lot of things. In fact, the kind of porosity your hair accumulates can be very different from person to person. How can the ends of your hair become porous? The ends of your hair are the oldest - they have had the most time to accumulate damage. While you up to 11 layers of cuticles covering your hair, if your hair is long there may be few layers left on the ends.  Brushing, combing, detangling, sleeping, wearing hats and collars, blowing around in the wind, wearing ponytails and braids and barrettes; these activities cause cuticles to chip or break away completely. Even more dramatic is over-washing the hair (especially if using strong or concentrated detergents), bleaching, highlighting or lightening the hair, permanent dyeing the hair ...

First off -  think of your hair not as a fiber like yarn because hair is more complex. Think of the inside of your hair like string cheese - protein which is flexible and retains water - it will swell when wetted. Then think of the cuticle as though you glued several layers of tiny, overlapping shingles to the outside of the cheese. You've used proteins and amino acids and lipids (fats) to glue all this together. It's flexible - but it's also prone to damage because proteins and fats do break down. Your hair's porosity is probably not the same at the roots as at the ends, the ends are usually more porous. "Pores" are openings in the cuticle layer(s) - whether they are chipped or torn cuticle scales (imagine torn or ripped-off shingles), or cracked, shrunken and fused, or simply not glued down very well. Any of these situations leads to a less-protected hair cortex - which means your interior of string cheese will dry out more quickly. ©Science-y Hair Blog 2013...

Sounds so nice – deep conditioning for your hair. And yet it seems impossible because hair is not living tissue. You wouldn’t try to deep condition a damaged, old wool sweater, would you? But then we don’t subject our woolens to the same handling we subject our hair. ©Science-y Hair Blog 2013 Deep conditioning hair really means several things: softening the hair, bonding compounds to the damaged areas to make hair “hydrophobic” or water-repelling like healthy hair. Deep conditioning is meant to maximize those things which conditioner does for your hair: reducing friction to prevent tangles and resulting breakage from combing and other mechanical damage, sealing in moisture, adding flexibility and softness. ©Science-y Hair Blog 2013 There are several aspects of deep conditioning: product distribution, substantivity (ingredients bond to your hair rather than rinsing off), product penetration into the hair, duration (time of treatment) and use of heat. ©Science-y Hair Blog 2013 Distributi...