Enamelled glass has been used in opaque or semi-transparent elements of the building envelope for a considerable time. Once the ceramic ink or paste is applied, it is burned in at a high temperature during manufacture, and the glass panes are subjected to thermal pre-stressing at the same time. In the case of enamelled glass, the pre-stressing process does not run undisturbed, meaning that the bending strength of the glass is sometimes significantly lower than that of standard panes. Digital printing is a method that can be used to
apply the ink to the enamelled glass. Ink is applied with a large-scale inkjet printer at a high resolution, using a digital template. Multi-colour printing takes place continuously, and any number of primary colour inks can be
mixed during printing. The coating thickness is initially about 15-20 μm. Overprinting can be carried out to improve the opacity of translucent colours. The colour composition differs from that of other application methods
(such as screen printing). The ratio of glass flow to pigment is altered in favour of the pigments. This is necessary to achieve sufficient opacity with thinner coatings. This article presents the results of four-point bending tests pursuant to the EN 1288-3 standard. This article compares the experimental results of digitally printed glazing with conventional printing methods and outlines the influence of the digital printing ink’s colour on the bending strength.