How Do No Tears Shampoos Work? - S1.E11
How surfactant, the ingredient in shampoo that causes the burning sensation and helps rid the hair of dirt, reacts with the eye's tear film. And a look at amphoteric surfactants, which are found in 'no-tears' shampoo, and their properties.
How Do No Tears Shampoos Work? - S1.E11
November 21, 1999
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