The ISO 18909-2022 standard focuses on evaluating the Image Stability of processed color photographic film and paper printings. The standard is divided into two parts: one is to predict the Stability of images under long-term dark storage, and the other is to measure the Color Stability of images under specific lighting conditions. The standard emphasizes that the shelf life of color photographic materials is affected by storage temperature, Humidity and lighting conditions, especially high temperature and high Humidity can accelerate image degradation. The standard provides methods for accelerated aging testing and light Stability testing in order to evaluate the long-term performance of images in a short time. It is suitable for museums, archives and other institutions that need to preserve color photographic materials for a long time. The standard does not specify specific acceptable ranges for fading and color variations, but provides the test methods and procedures required to evaluate image Stability.