Autoclave Indicator Tape Autoclave Indicator Tape consists of yellow indicator stripes and pressure-sensitive adhesive. When the steam sterilization is completed, the color of the indicator strips will turn from yellow to dark brown or black. The complete color change occurs in 15 to 20 minutes at 121?/250?,in a gravity cycle, and in 6 minutes in both a132?/270? gravity and vacuum-assisted cycle. This indicator tape is designed to secure packs wrapped with woven, treated woven, non-woven, paper and paper/plastic wraps. After sterilization, the tape can be removed easily and cleanly, no adhesive residue.