As with negatives, the image quality  of slides deteriorates   over the years, even if they are stored safely in magazines. Slides are made up of chemicals that react very strongly to light, moisture and temperature fluctuations. Over time, these chemicals will erode, resulting in poor image quality. This is noticeable through the yellow coloration and slight cracks. Dust, oil, dirt or certain gases also contribute to the deterioration of the image quality. The aging and deterioration of the image quality of the slides is largely determined by climatic factors. In addition, the quality of the original film material also plays a decisive role.