【Instructions:】 1. Place the plasma indicator tape in the bag or wrapper with the object. 2. Try to avoid the device completely covering the tape. 3. After the end, observe that the indicator tape is reached or is lighter than the standard color. 【Precautions:】 1. Keep away from acids, alkalis and environments where oxidizing substances are present. 2. Keep away from heat sources and light sources; store below 25 degrees. 3. Valid for 18 months.