Shampoos are designed with cleansing agents called surfactants. A surfactant molecule has a hydrophilic (water attracting) "head" and a lipophylic (oil attracting) "tail". When you apply the shampoo and water to the hair and generate lather, the hydrophilic head of the surfactant is drawn to the water, while the lipophylic tail is drawn to the oil and grease on the hair and scalp. This oil and grease contains dirt and skin particles. The lathering action of the "head" and "tail" of the surfactant creates a push and pull effect on the oil and grease, lifting it from the hair shaft. The more oil and grease there is to bond to the surfactant molecule the less the shampoo will lather. This is why a second shampooing always lathers more richly. When you rinse away the shampoo, the water is pulled along by the hydrophilic head of the surfactant, away from the hair and scalp, and down the drain.
How do Shampoos work? An info post.
- Thread starter techblade01
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So...it would seem that shampoo would sort of be a good pre-shave, no? I shampoo my face (have always shampooed my 'stache...now have expanded the effort) in the shower just because I can. It's a good thing, I guess...
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It would be good to wash your face before the shave with shampoo. It would rid the oils that could "theoretically" could cause a unhydrated facial hair to be tougher than a moist hydrated hair. There for a rougher shave.
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Great info, now I know why it takes off oils on my hair and using conditioner is necessary.
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