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Examinationmethods



Heavy metals / metals
Elements according to the Packaging Directive 94/62 / EC (lead, cadmium, total chromium, mercury), EDQM Publication: Metals and alloys in food contact materials or metals in accordance with Annex II to Regulation (EU) No 10/2011





Damage analysis/ analysis of complaints
In many cases, it is not immediately obvious which kind of tests are necessary and reasonable for the clarification. Furthermore, test results which are available in short time are often helpful for further decisions. Our “diagnostic concept” provides the agreement of a limited budget (normally 700,- up to 1.000,- Euro) for the screening and evaluation of information already available as well as the realization and assessment of first tests according to an agreed schedule. The result is a more detailed view of the damage, possible solutions and indications for additional and reasonable investigations and researches are given. You will receive first reliable test results and an appropriate documentation of the current situation at short notice and at a fixed price. Information on the frequency of the anomalies ,point in time of recognition, technical information such as material structure, yet present test results are known to be helpful for successfully examination. If available, please send us reference samples, data sheets, specifications.





Seal strength, tensile test on strips (temperature range - 40 up to +120 °C)
Seal or weld seam strength of machine-made seal seams on pouches, packages or seal samples (also peel, cold seal, reseal) according to DIN 55529 (15 mm strips), ASTM F 88 (1 inch or 15 mm strip width), DIN EN 868 Part 5 Annex D for medical packaging, included description of fracture pattern.





Microtome section/ cross-sectional image
Cross section of films, moulded forms, sealed seams etc., thickness determination of visible layers included,with reflected or transmitted light microscope (accredited test method).





haze/ transparency
Method for quantification of the optical properties of transparent or translucent materials (not coulored or metallized). The test method describes the scattering of light caused by deterioration of a film. A low haze value characterizes a low turbidity equivalent to a good visibility of details behind or under the film lying fillings or labels. With increasing haze value the "frosted - glass- effect" increases, ie, details, eg Labels are ultimately recognizable only by direct contact with the surface. ASTM D 1003 = calibration without compensation port vs. DIN ISO 13468 = calibration with compensation port. The measured values differ slightly, but the measurements are carried out in principle on the same principle.





Water vapour transmission rate (WVTR) plastic films, laminates, coated papers and aluminium foils
Measurement is performed using the water vapor specific hydrolysis method.



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