Thermal paper is relatively fragile. Because of this, certain precautions must be followed to prevent any premature deterioration during storage or while handling until the end of its use.
Care in Storage
Ricoh Thermal papers can be unused without any deterioration for a long time after production if they are stored in the dark at temperatures that do not exceed 95° F and a relative humidity not exceeding 85%.
In addition to the above care, avoid long term exposure to direct sunlight and strong fluorescent light sources. These light sources can generate some background coloration if left unchecked. Do not place Ricoh Thermal paper near heat sources.
Care in Handling
Avoid any contact with materials composed of, or containing, solvents or plasticizer. Avoid/ minimize any scratching or rubbing as this may cause unwanted thermal revelation. Avoid any contact with water.