eli5: why does the second shampoo make more foam ?

Question

eli5: why does the second shampoo make more foam ?

In: 0

Answer 1

Shampoo works by binding to certain molecules like magnets. If you have oil in your hair, it will bind to those and create tiny, microscopic oil-in-shampoo bubbles, which you can wash away with water. If you don’t have oil in your hair, the shampoo will find something else to bind to; in the absence of anything else, it will bind to air molecules (oxygen and/or nitrogen gas). These will make larger, more visible air bubbles the same way soap does, so they’re more noticeable and foamier.