What is exsolation

Nothing.

There is no word, "exolation."

Do you mean exsolution?

http://www.merriam-webster.com/dictionary/exsolution

I believe you meant to ask about "exfoliation," which refers to the process of removing dead skin cells from the outermost layer of the skin. Exfoliation is done to promote healthy skin renewal and to improve the texture and appearance of the skin. There are various methods of exfoliation, including physical exfoliation with scrubs or brushes, as well as chemical exfoliation using products with alpha-hydroxy acids (AHAs) or beta-hydroxy acids (BHAs). These methods help to slough off dead cells, unclog pores, and reveal smoother, fresher skin. It is important to choose a gentle exfoliation method suitable for your skin type and to follow the instructions provided by the product or a skincare professional.