Professor Stefan Barth MSc (Bonn) PhD (Bonn)
2013-6-24 · Plaster when wet is essentially a soft, 'plastic' mixture; it is usually comprised of lime (heated, ground gypsum plus water), sand and hair, and is spread on walls to form a smooth surface suitable for painting. Plaster of Paris is comprised of calcium sulfate and is a potential eye and respiratory system irritant.
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