- Cavex Green Clean is a smart solution for cleaning dental impression trays, instruments, and other accessories not by scratching or sanding, but simply by dissolving alginate and gypsum residues. Simply submerge for 15-30 minutes, rinse under running water and the sparkling clean impression tray is ready for use. - For removing alginate and gypsum residues from impression trays, spatulas and other instruments. - Quick and easy. **For further product information, please contact Chat Support**