First, Bell AG replaced their sealing tools to give a sealing contour with a constant peeleline profile. This profile ensures an optimal distribution of force during opening and minimizes the risk of the plastic cover rupturing. Secondly, the force required to open a peelable package had to be within a defined range, as determined in a series of technical tests and based on the findings of the two consumer tests with healthy people and people with hand disorders, performed by Schreib and Liebmann (2011) and Marks et al. (2012), respectively.