Bowie & Dick Test is for the exposure of steam at temperature 134°C for 3.5 mins or 121°C for 15mins. The ASURE Bowie-Dick Test pack consists of a series of steam penetration &air removal barriers in the center of which is a chemical indicator sheet. The test pack is placed directly in empty steam sterilizer chamber. During the process, the cycle must remove and displace the air from the barrier material and replace it with steam throughout the pack. A uniform change in color indicates completion of process. The change in colour indicates that machine is working appropriately.