Why does the skin of our finger shrink when you wash clothes for a long time?

When we wash clothes, our hands are exposed to water for a long time. Our hands behave as a hypertonic solution and the outside of our hands behave as a hypotonic solution. Our skin behaves as a semi-permeable membrane as it is porous. So actually the water is not absorbed here just leaving and thus it shrinks. Soap solution is a hypertonic solution i.e., more concentrate than our skin cells. The process is called exosmosis.

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