Tepid water, what's that ?

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In my studies of Holistic Skincare Products, I came across this, '' Tepid Water''. But I have learned that it is a mixture of,'' two parts of cold water and one part boiling water which is about at 105 degrees F. Lukewarm water are about the same range of temperature which are considered the same. Not hot and not cold. Why not saying use lukewarm water or does it need to be partly boiled water and cold separetely. But anyway, tepid water is good to refresh tired skin. image from pixabay