Last update: 02.09.2019
Standards & norms
4.

Glass edges

The quality of glass edges of single panes that are built into a glass system has an enormous influence on the longevity of the product. Glass edges without further processing may show micro-cracks, which have negative effects and can lead, in extreme cases, to breakages.

The quality of glass edges of single panes that are built into a glass system has an enormous influence on the longevity of the product. Glass edges without further processing may show micro-cracks, which have negative effects and can lead, in extreme cases, to breakages. The quality depends on the status of the cutting tools as well as on further edge processing. Definitions can be found in EN 12150.

Edge types

  • Round edges (RK) This edge surface grinding is somewhat rounded. The most popular type by far is the “C edge”. 
  • Straight edge (K) The straight edge forms an angle of 90° to the glass surface.
  • Mitre edge (GK)  The mitre edge forms an angle between < 90° and ≥ 45° to the glass surface. There is no sharp edge but always a bevel of 90° to the glass surface.
  • Facet edge (FK) In this case, there will be an optional angle deviating from 90° to the glass surface. Depending on the facet width, differentiations are made between flat and steep facets. In addition, the faceted edge runs towards a remaining 90° edge, thus a bevel that may also be rounded.
Edge types

Edge processing

Edge processing

 

Edge geometries

Edge geometries