This document is a USPTO patent application (US20260083643A1) for a method of coloring dental ceramic. The core innovation lies in the composition of the coloring liquid, which must contain at least two types of metal ions with a specific difference (0.5 to 4.0) in their standard oxidation-reduction potentials. The application was filed on August 28, 2023, by inventors Kento Nagaoka, Mizuho Onodera, Koji Yamamoto, Yusuke Hokii, and Shigenori Akiyama.

As this is a patent application, it does not impose immediate compliance obligations or penalties on regulated entities. However, it signifies potential future intellectual property developments in the dental materials sector. Companies involved in the manufacturing or development of dental ceramics and related coloring solutions should monitor the progress of this patent application and similar filings to understand evolving technological landscapes and potential patent infringement risks.