A glass-ceramic article includes at least one substrate, such as a plate, made of glass-ceramic, the substrate having a face including a microtexturing such that the arithmetic mean surface roughness Ra, measured according to standard ISO 4287, is between 0.14 and 0.40 μm, and the total roughness, Rt, measured according to standard ISO 4287, is between 1.15 and 5.00 μm.

The invention concerns a polishing apparatus (1), which has a very short handy and comfortable to handle construction with a very short length L. In order to reduce energy loss a direct vertical shaft (3) is used, which shaft (3) eccentrically drives the rotational head part (9). The special three legged support of the polishing apparatus (1) consists of the sanding or polishing disc (10) and two separately placed from each other adjustable support legs (11, 12). In this way flat and bent surfaces, such as vehicle panes, can be polished accurately and efficiently.

A method is provided for corner contouring of flat glass substrates in a continuous feed-through process by a contouring tool. The method includes the steps of: synchronization of the movement of the contouring tool to the continuous feed-through movement of the flat glass substrate, contouring of a corner of the flat glass substrate, wherein a relative movement between the contouring tool and the flat glass substrate is performed so as to overlap the continuous feed-through movement.

A glass-ceramic article includes at least one substrate, such as a plate, made of glass-ceramic, the substrate having a face including a microtexturing such that the arithmetic mean surface roughness Ra, measured according to standard ISO 4287, is between 0.14 and 0.40 m, and the total roughness, Rt, measured according to standard ISO 4287, is between 1.15 and 5.00 m.