· 2013-06-25 · gypsum is the ideal surface for a wall because it has the same ph value and...

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Page 1:  · 2013-06-25 · Gypsum is the ideal surface for a wall because it has the same PH value and thermal conductivity properties as the human skin. Gypsum is made UP of minerals, and
Page 2:  · 2013-06-25 · Gypsum is the ideal surface for a wall because it has the same PH value and thermal conductivity properties as the human skin. Gypsum is made UP of minerals, and