Why does a bar of soap produce a great lather when it’s new, then not at all when it’s smaller?

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It’s supposedly the same soap through and through, all the way to the core of the bar, right? Why does it react so differently to water and being rubbed on skin when it is reduced to a sliver?

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Anonymous 0 Comments

The surface area of used soap gets smaller and requires more rubbing to produce the same amount of lather compared to new one. Lather needs friction. More surface area more friction and more Lather.

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