40KG PLASTER OF PARIS (P O P) OR KNOWN AS CALCIUM SULFATE GYPSUM MATERIAL (CaSo4) .
IT MAKES QUALITY SMOOTH DUCTLESS SCHOOL CHALK.
IT MAKES TAILOR CHALK.
BONE FRACTURE.
ARCHITECTURE FEATURES OR DESIGNS, SO ENGINEERS USE IT TOO.
IT'S NOT HARMFUL TO PEOPLE.
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