Here are two articles from Wilhelm Imaging Research. Wilhelm Imaging Research, Inc. conducts accelerated light exposure and dark aging tests to determine the comparative life expectancy of inkjet and other digitally printed photographs, as well as that of traditional black-and-white and color photographs.

Image Life of Digitally Printed Photographs

This first article compares 11 different color printing processes including Epson pigment-based inkjet prints, HP dye-based  inkjet prints and Fuji Crystal Archive an analog silver dye based process.

Epson P8000 Print Permanence Ratings

This article shows the expected display ratings for prints made from our printers when displayed or stored under different conditions.