Improved stones for the construction of models and dies.
D002133:Calcium Sulfate; D003764:Dental Materials / Q000592:standards*; D008031:Lignin / Q000494:pharmacology; D003765:Models, Dental / Q000592:standards*; D013451:Sulfonic Acids / Q000494:pharmacology
D003764:Dental Materials; D013451:Sulfonic Acids; D008031:Lignin; D002133:Calcium Sulfate