The tonal range that we can hold while silkscreening the discs is 15-85%. Tones lighter than 15% may blow out to zero, and those dark than 85% may fill in completely. As a result, we do not recommend using very dark or very light photos on the disc. High-contrast images work best. Subtle changes in tone can be lost in the silkscreening process.
Here is a comparison of a photo printing on a booklet and printing on a disc. The image on the disc loses details in the piano player's coat, and the highlight on his head. The subtle variation in the background images are also lost. Expect to lose detail and overall image quality if you print a photo on the disc.