Burst and Creep Testing is carried out on Labthink LSSD-01 Leak and Seal Strength Tester per standard ASTM F1140 & ASTM F2054 to determine the seal strength of a flexible packages or a three-side-sealed packaging. Burst Testing is to fill the package with air until it bursts and measuring the terminal pressure. Creep Testing is to inflate the package to a constant pressure and then check if the pressure in the package can hold a specific time.