It’s nice to see a selection of coloured soaps and I have enjoyed using several. All of the produced white lather.
My question is. Do any soaps produce coloured lather? More for novelty value I guess.
And if not does anyone know why it can’t be done.
It's because of the film of soap that lathers is very thin and is transparent. When you lather it light gets scattered off the bubbles and appears white. This is similar to the reason why polar bears appear white yet their fur is actually transparent, and you also see this same thing in snow and clouds.
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