| abstract |
PROBLEM TO BE SOLVED: To provide a tooth-coloring ink based on a shellac ethanol solution, which can realize a clear and sufficiently dark color on the tooth surface, and a storage for the tooth-coloring ink. Provide a way. Further, the present invention provides an ink for coloring teeth, which can contribute to suppression of the propagation of dental caries and periodontal bacteria in the oral cavity. SOLUTION: A predetermined amount of a titanium oxide powder and a predetermined amount of a coloring agent are uniformly mixed in a shellac ethanol solution obtained by dissolving a shellac resin in ethanol containing a dispersibility improver composed of propylene glycol and glycerin fatty acid ester. Use a tooth-coloring ink consisting of a suspension in a dispersed state and store at 10 ° C. or less while maintaining a weak alkalinity. Further, an antibacterial agent and the like are added to the ink. |