Fully or partially enamelled glass produced as tempered glass (ÖNORM EN 12150) or thermally toughened glass (ÖNORM EN 1863) by applying and burning-in ceramic colours.
Roller coating method
The flat glass pane passes below a fluted rubber roller that applies enamel paint to the glass surface. This ensures a uniform and even colour distribution over the entire surface.
A typical characteristic is that the fluted roller pattern is visible if viewed close-up (painted side). From the front (viewed through the glass), this “fluting” is, however, practically invisible under normal conditions. Rolled enamel glass is generally not suitable for see-through purposes, so these applications must be agreed upon beforehand with the manufacturer. A so-called “starry sky” (with very small defects) can occur in the enamel.
Screen printing method
A full-surface or partial-surface application of paint is possible. On a horizontal screen printing table, the paint is applied to the glass surface through a narrow-mesh screen using a squeegee; in this process, the applied paint thickness can be influenced by the mesh width of the screen and the thread diameter. The applied paint layer is therefore generally thinner than with the roller coating method, and it will be opaque or translucent, depending on the selected paint.
Slight stripes both in the printing direction and transversely to it, as well as occasional slight blurring, are typical for this production process, depending on the paint.