Most
conditioners fall into the category of surface acting conditioners. They are
formulated to work on the outer layer or cuticle of the hair strand. Deep
conditioners - the ones where you are instructed to keep on from 15 to 20 mins
with a plastic cap and/or heat - contain ingredients that are humectants
(moisture retainers).
Deep
conditioners penetrate the inner core, the cortex, of your hair supplying
moisture and protein. They also contain hydrating ingredients such as aloe,
wheat germ and olive oil. These conditioners, are called pack conditioners, and
are heavy and creamy in consistency.
Leave-in conditioners do not penetrate the hair strand, but are formulated to quickly coat the hair and protect it until the next washing. They are lightweight, and will contain lighter conditioning agents, which add little weight to the hair.
Each
hair strand has three layers and the cuticle is the outer layer which protects
them. The cuticle consists of scales that cover the hair strand. Everyday
styling, combing/brushing, washing, and the strands simply rubbing against each
other causes friction and raises the scales on the hair strand. Conditioners
work by coating the hair strand, making the scales close against the strand
smoother.
When
the scales on the hair strand become severely damaged via harsh chemicals,
bleach, sun, etc. the hair strand is weakened, begins to break down and layer
by layer the cuticle begins to disappear exposing the cortex layer which it
once protected. Once the cortex is exposed, split ends appear and the hair
eventually breaks.
Again,
conditioning your hair is a way to keep the scales on the hair strand smooth
and therefore protecting the cuticle. Also after conditioning, when the hair
dries, it is coated with a thin film,
and prevents static electricity from building up and 'frizzing' the
hair. Our hair carries negative electrical charges, ingredients in conditioners
carry positive electrical charges. The negative charges attract to the positive
charges, which cancel each other out and therefore reduces static electricity,
again eliminating frizz.
The thin film left behind by ingredients found in conditioners like panthenol, amino acids and Vitamin B5 also help raised cuticle scales on each hair strand to lie flat, which enhances hair color creating luster and shine. Flat cuticles also make the hair strands smoother and detangling much easier.
Conditioner Info:
h2g - http://www.bbc.co.uk/dna/h2g2/A851627
About.com - http://beauty.about.com/library/bltips531.htm
Pioneer Thinking - http://www.pioneerthinking.com/beauty/hair/conditioner/
Motown Girl - http://motowngirl.com/index.php/deep-conditioning-tips.html
Stay tuned for more articles from the Natural Hair Agenda Series.
VERY INFORMATIVE, I KNEW THERE WERE DIFFERENCES, BUT NOT IN DETAILS...THANK YOU FOR SHARING!
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