Patents Assigned to Vetriceramici S.p.A.
  • Composition for colouring glass and uses thereof
    Patent number: 8932967
    Abstract: The present invention relates to a coloring composition free of nickel oxide. In particular, the coloring composition for glass comprises manganese dioxide (MnO2), chromium oxide (III) (Cr2O3), cobalt oxide (Co3O4) and a glass medium. Furthermore, the present invention relates to the process for producing the coloring composition and the use thereof for the purpose of imparting a dark color (black), in particular a blue-violet-black color, to the glass.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: January 13, 2015
    Assignee: Vetriceramici S.p.A.
    Inventor: Michele Bettoli