Instructions: Cut the appropriate length of the indicator tape and stick it on the seal or surface of the article to be sterilized (in order to make the effect obvious, the cut length can be appropriately extended, or the article package can be directly spirally wound), and then placed at 121 ℃ to exhaust steam pressure Steam sterilization for 20 minutes or 132°C pre-vacuum pressure steam sterilizer for 4-6 minutes. After sterilization, the diagonal indicator mark on the indicator tape changes from light yellow to black. Sterilization status and records can be directly written on the back of the indicating tape.