Hair Porosity: The Float Test Part Two
It's time to examine the float test for hair porosity more fully. I began looking into how the float test could give you an inaccurate result in the previous post . Elsewhere on this blog I have mentioned that this test is not very accurate. This post will show you why. To make the test more accurate, see the tips at the end of the post © Science-y Hair Blog 2 The idea behind the float test follows this line of thinking: If hair is porous, it takes on more water than if it is not porous. Therefore, porous hair might sink because it takes on water and becomes heavy. That is - the weight of the water the hair is absorbing overwhelms the power of surface tension (between water molecules) that keeps the hair suspended on top of the water. And in a sense this is not wrong but it is incomplete. But there are too many other variables in play to make this an accurate assessment of how porous your hair is by simply grabbing some hair and dropping it in a glass. Your experiment needs ...