There are many factors that cause image degradation: paper type, inkjet materials, conditions such as light, heat, atmospheric pollutants, etc. Any paint, photo or art print cannot stand straight sunlight for a long time. Keep your valuable art print in good lighting conditions and use a UV glass or continuous cast acrylic. Epson UltraChrome K3 ink has improved print permanence characteristics that provide lightfastness ratings of up to 70 years for Color and over 150 years for Black and White prints under rigorous industry accepted display conditions. Also, the paper type will affect a lot for lightfastness. Read more from here.