Plasma Autoclave Tape

Autoclave tape is an adhesive tape used in autoclaving (heating under high pressure with steam to sterilise) to indicate whether a specific temperature has been reached. Autoclave tape works by changing color after exposure to temperatures commonly used in sterilization processes, typically 121°C or 134°C in a steam autoclave.

Autoclave tape works as a process indicator for steam sterilizers. It is most commonly used and well-suited in clinical and research environments. A person using autoclave tape will apply small strips to the item before placing it in the autoclave — a machine that applies high-temperature steam to sterilize objects. Though the tape may resemble masking tape, its stronger adhesive allows it to adhere under the hot and moist conditions within the autoclave.

Autoclave tape's most notable characteristic is that it is an aggressive, pressure-sensitive adhesive designed for use with flexible sterile barrier systems, such as wraps and plain closure bags. It also adheres firmly to other materials like linen. By design, the adhesive attaches to many different wraps, substrates and surfaces to ensure the pack stays secure during the entire sterilization process.

Though autoclave tape may have changed color during the sterilization process, this does not necessarily mean that an item is fully sterile. The tape will change upon exposure to the desired temperature it is indicated for. However, for proper steam sterilization to occur, the entire item needs to reach and maintain a temperature of 121 degrees Celsius for 15 to 20 minutes to ensure the items' sterility.

Note that autoclave tape and the indicators do not prove that the sterilization process has killed organisms. Instead, they demonstrate that the autoclave has reached a temperature of 121 degrees Celsius. Environmental, Health and Safety recommends that you do not use autoclave tape as the only indicator of decontamination or sterilization.