Pentax Quality Paper is the only consumable required for your Pentax PocketJet printer making the combination one of the highest quality, lowest costs per printed page in the portable printing industry. Pentax Quality Paper is guaranteed against failures due to defects in materials or workmanship for the first 90 days of ownership. Once Pentax Quality Paper has been imaged with a clear dark image, the image will remain legible for at least seven years, assuming the documents are properly stored with compatible materials under normal filing conditions, with a relative humidity between 45 and 65 percent, as well as a temperature below 77F.