ABSTRACT
The Department of Trade and Industry (DTI) indicates that shape, size, weight, surface finish, visuals and opening devices all play a part in the ease of package opening for all age groups. (DTI, 2000) The three physiological functions used in opening packs are visual, cognitive and manual (muscle). Visual function is employed in reading and in inspecting and identifying the mode of opening, cognitive function relates to understanding and adopting to perhaps unfamiliar mechanisms whilst the manual and muscular function relates to the force required to open the pack.
