Dental impressions, whose surface may carry a great number of bacteria, viruses and other pathogenic microorganisms because of getting in touch with patient’s saliva or blood in making process, are liable to cause cross- infection among dentists, patients and dental technicians. For alginate impression materials which are widely used in stomatology hospital of China, the current disinfecting methods include immersion or spraying with disinfectants. However, immersing disinfection could make adverse impact o...