The test is carried out in accordance with the standard DIN 55529:2012-09 and applies to the testing of seals on packaging made of flexible packaging materials, e.g. plastic, composite materials as well as coated and printed aluminium foils and papers. The sealing layer can be a plastic, sealing varnish or a cold sealing material. The sealing seams are produced either on a laboratory sealer or on a packaging machine.