Steris TST Bowie Dick Test Pack of 20

A unique combination of advance Browne intelligent ink technology and the original Bowie Dick concept. A successful test confirms that steam penetration into a test pack is rapid and even and, by implication, that air and other non-condensable gases have been effectively removed. The chemical indicator sheet at the centre of the pack shows a defined colour change from yellow to dark blue/purple when exposed to a specific combination of time, temperature and steam.