PROCESS FOR MANUFACTURING A GLASS SUBSTRATE EQUIPPED WITH PRINTED PATTERNS AND A PROTECTIVE UNDERLAYER FOR ONE-WAY VISION

摘要

The present invention relates to a process for manufacturing a one-way vision glass pane comprising one or more separate enamel patterns composed of a number of exactly aligned layers, characterized in that:;a) at least one protective layer based on oxides, having a thickness greater than or equal to 10 nm, is deposited on the glass substrate,

b) at least two layers of different compositions are deposited on the protective layer, the composition of one containing at least one mineral pigment and being free of glass frit, the composition of the other being an enamel containing at least one glass frit and at least one mineral pigment having a color different from that of the layer free of glass frit, the layer free of glass frit being deposited over all or some of the surface of the pane and the layer of enamel being deposited by screen printing in the shape of the desired pattern(s),

c) the pane coated with said layers is heated at a temperature sufficient to fire the enamel, and

d) the pigments not fixed by the enamel that are located outside of the pattern(s) are removed, the particles of pigment(s) and the particles of glass frit(s) having a similar size, in particular a particle size distribution such that 50% of the particles have a size of less than 7 μm.

主权项

1. A process for manufacturing a one-way vision glass pane comprising one or more separate enamel patterns which comprise a number of exactly aligned layers, the process comprising:
(a) depositing at least one protective layer based on an oxide and having a thickness greater than or equal to 10 nm on a glass substrate, (b) depositing at least two layers of different compositions on the at least one protective layer, the at least two layers comprising a layer that comprises at least one mineral pigment which layer is free of glass frit, the at least two layers further comprising a layer that comprises an enamel that comprises at least one glass frit and at least one mineral pigment having a color different from that of the layer free of glass frit, wherein the layer free of glass frit is deposited over all or some of a surface of the pane and the layer of enamel is deposited by screen printing in a shape of a desired pattern, thereby obtaining a pane coated with at least three layers, (c) heating the pane coated with said at least three layers at a temperature sufficient to fire the enamel, and (d) removing a portion of pigments not fixed by the enamel located outside of the pattern, thereby obtaining the one-way vision glass pane comprising one or more separate enamel patterns which comprise a number of exactly aligned layers, wherein particles of the pigments and particles of the at least one glass frit have a similar size.