DIN 55409-2
DIN 55409-2 Packaging - Test method for determining opening forces for peelable packagings - Part 2: Dimensionally stable packagings
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2013
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2013