With the quality and testing standards RAL-HZ 520 from May 2016 a self-monitoring as well as an external monitoring of the following primary products of multi-pane insulating glass were introduced:
Hence, the consistent quality chain is strengthened. These components are now liable as well to the self-monitoring and the external monitoring. Only the components that are named in the current version of thelist of quality monitored components may be used for the production of multi-pane insulating glass that carries the RAL quality label.
