||UltraChrome Ink Cartridge Lightfastness*:Color: up to 100 yearsBlack and white: over 100 years Print Yield:Print yield may vary, depending on how often you run cleaning cycles and how much you use the printerYield of the initial cartridge set is reduced because of ink charging Cartridge Life:2 years from production date if unopenedWithin 6 months after opening package, at 77 F (25 C) Temperature:Freezing: Ink thaws and is usable after at least 3 hours at 77 F (25 C) UltraChrome Ink Users: Your printer uses two black ink cartridges. Unless you are switching between black ink modes, use the same type of cartridges as are currently installed. Check their type by looking at the installed cartridges. If you install an incorrect cartridge, you will see the message WRONG INK CARTRIDGE. * Preliminary data from Wilhelm Imaging Research, Inc. indicate the lightfastness of color UltraChrome prints made by the EPSON Stylus Pro 7600 and 9600 printers will be rated up to 100 years under glass on specific EPSON media. Data indicate the lightfastness of black and white UltraChrome images printed using the 7-color mode will be rated as greater than 100 years under glass on specific EPSON media. Ink lightfastness ratings are based on accelerated testing of prints on specialty media, displayed indoors, under glass. Actual print stability will vary according to media, printed image, display conditions, light intensity, humidity, and atmospheric conditions. EPSON does not guarantee longevity of prints. For maximum print life, display all prints under glass or lamination or properly store them.Visit www.wilhelm-research.com for the latest information.