Abstract: A glass panel is partially printed with a plurality of layers in the form of a print pattern which subdivides the panel into a plurality of discrete printed areas and/or a plurality of discrete unprinted areas, the layers being in substantially exact registration. Exact registration is achieved by the application of a plurality of superimposed layers to a sheet of glass. One layer contains-ceramic ink comprising glass frit. The glass sheet and layers are subjected to a heat treatment process which causes the glass frit to fuse to the glass and bind at least one other layer of ink within the print pattern. Ink outside the print pattern is burnt off and/or vaporised during the heat treatment process and/or removed by a subsequent finishing process, to leave the desired layers in substantially exact registration within the print pattern.

Abstract: The present application relates to a method of making a glass panel that is partially printed with a plurality of layers in the form of a print pattern which subdivides the panel into a plurality of discrete printed areas and/or a plurality of discrete unprinted areas, said layers being in substantially exact registration. The substantially exact registration is achieved by the application to a sheet of glass of a plurality of superimposed layers, one of the layers containing a ceramic ink comprising glass frit, in a print pattern. The sheet of glass and plurality of layers applied thereto are subjected to a heat treatment process which causes the glass frit to fuse to the glass and bind at least one layer of ink within the print pattern. Any ink not within the print pattern is burnt off and/or vaporised during the hat treatment profess and/or removed by a subsequent finishing process, to leave the desired layers in substantially exact registration within the print pattern.