The inks used in computer-printers are made from dyes, which are typically fugitive.
Most computer printers use ink systems that contain water-soluble dyes.
Dyes are typically fugitive, meaning that they readily fade when exposed to sunlight or any light source containing UV wavelengths. Aside from the need for UV protection, the print also needs to be protected against water, moisture and handling to keep the image from smudging. Sheets that do offer protection are expensive and usually impractical for the average artist. This type of protection also limits the manner in which a print can be safely displayed. There are other systems that claim to offer UV resistance to fading.