21 jan 2015cerulean demonstrates importance of testing creases on whole cartonscerulean has published a case study showing how its whole carton crease testers have been used to solve an intractable problem for a leading carton producer.the producer experienced rejections of two million cartons while another visually identical carton from another manufacturer caused no packing problems and noone could find out why.the cartons from the two producers were for high speed packing of cake products featuring a top window opening. both boxes were produced using the same type of bobst flat die cutter.to understand the problem, complete cartons from each supplier were blind tested using cerulean&39s laboratory carton tester lct the same way they are erected on a highspeed automatic packing machine.the whole carton test, rather than a small sample, proved essential. creases near to the window cutout on one carton type caused the problem. this was previously undetectable but clearly visible on the crease torque measurement produced by the lct.tests were then verified on site by cerulean&39s portable carton tester pct and a tiny adjustment to the creasing knife solved the issue. no further machine problems or rejected cartons were experiencedcerulean, part of molins plc, is a global provider of packing and testing equipment based in the uk with over 100 employees and an international network of engineers and distributors. the company designs, manufactures and distributes a diverse range of packing and testing solutions. for further information www.cerulean.com 
