High temperature-resistant permanent labels for identifying various containers and surfaces that undergo autoclaving and dry heat sterilization. Temperature range from -60°C to +150°C (-76°F to +300°F). The labels can be applied to metal, plastic, and glass surfaces and withstand 20 autoclave sterilization cycles at +121°C (+250°F) and 16.5 psi pressure. The labels and the printout can withstand high temperature exposures as well as gamma irradiation (up to 50 KGy) and ethylene oxide sterilization. Ideal for identifying containers and surfaces that need to be sterilized inside autoclaves, dry-heat sterilizing equipment, and with gamma irradiators. Waterproof, weatherproof, thermal-transfer printable.The upper point temperature might slightly vary depending on the duration of the exposure.