Printer cartridges should be stored in a dry, dark environment that is between 60-75 degrees Fahrenheit. Cartridges are vacuum sealed to maintain optimum print quality. We recommend keeping your cartridges sealed and in their original packaging if they do not need to be used right away. If they are removed from their packaging prematurely, they will be more likely to dry out. Most ink and toner has a shelf life of around 2 years if the cartridges remain sealed but they may be usable after that period if they are stored in the correct environment.