A:Answer Hello DARHAR. Different variables can impact ink longevity, such as paper brand/type, storage, and environmental factors. If kept in the most optimal conditions, prints can sometimes last for decades. However, this is purely an estimate, and unfortunately, there isn't a specific timeframe we can provide. For optimal performance, it is recommended that the ink be used 6 months after opening the bottle. Regards, Kevin - The Epson Team.