Our economical Laboratory Porcelainware is made of high purity raw material, uniform in quality and resistant to acid and alkalai. Designed to withstand sudden temperature changes without cracks, explosion or deformation.Under normal conditions the glazed pieces can sustain a temperature of 1050°C while the unglazed ones can withstand 1350°C. Mortar with spout, outside wall and rim glazed, handle of pestle glazed.