1. The moisture content in the steam is high, and the humid steam may increase the humidity of the sterilized articles, making the color change of the indicator band uneven.
2. There are sundries in the exhaust pipe or pipeline of the pressure steam sterilizer, which may hinder the steam flow and affect the sterilization effect, resulting in uneven discoloration.
3. The placement of sterile articles may be irregular, which may lead to some articles not being fully exposed to steam, resulting in uneven discoloration of some articles.
4. The indicator belt may be affected by humidity, high temperature, light, ionizing radiation and other factors. In the process of storage, its performance is degraded, resulting in uneven color change during use.
In this case, it is suggested to check whether the steam is dry, whether the sterilizer works normally, whether the sterile items are placed in a standardized way, and whether the indicator tape is stored correctly. If the above actions do not improve the situation, you may need to seek professional help to further investigate the problem.