Secure the robustness of a package

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This master dissertation was made during 2003 at technical package development within Tetra pak R&D AB in co-operation with packaging logistics at Lund institute of technology Theoretic material was gathered from internal development reports, public patents, external literature and interviews with experts within the field. We performed smaller test experiments and analysed them using the simple comparative experiment method. Using the gathered information a theory to plan the multi factor experiments was set up. These multi factor experiments was performed in the final folding machine and tested with a light test method. The light test is a measurement method that we further developed. It can be used to discover and locate cracks in the aluminium foil. We have also used the light test together with Optimas 6.51 to compare sizes of cracks. We found that the biggest cracks appeared in the k-zones and therefore w...