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

Question

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?

In: 718

Answer 1

This doesn’t happen with hand made soap. I make soap from oils and lye and the bar produces a great lather right down to the last slither.