High Quality Content by WIKIPEDIA articles! Print permanence refers to the longevity of printed material, especially photographs, and preservation issues. Over time, the optical density, color balance, lustre, and other qualities of a print will degrade. The rate at which deterioration occurs depends primarily on two main factors: the print itself, that is, the colorants used to form the image and the medium on which image resides, and the type of environment the print is exposed to. For inkjet prints, dye-based inks last generally longest when used with specific paper types, whereas pigment-based inks can be optimal on more types of paper. Ink-jet paper types include swellable paper, porous paper, and cotton rag paper. The longevity of images on chromogenic color photographic papers depends on the temperature and relative humidity of the storage environment, and on the total light exposure they receive. Older chromogenic papers undergo more rapid fading compared to modern materials.

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