"[0024] The quantity of pigment dispersed in the mass of the ceramic is preferably between 1 and 5%, preferably 2 to 4%; the lower values yield more pastel shades, while the higher values yield brighter shades.
[0025] For example, ceramic timepiece components may be obtained in the red range by using gold nanoparticles with an average diameter of between 10 and 15 nanometers dispersed in a zirconia or zirconia/alumina matrix."
aus der letztpublizierten Patentschrift :gut: :gut: :gut:
Patent