| 摘要 |
PROBLEM TO BE SOLVED: To provide a concealment printing system using a heat sensitive agent, in which the concealment notation of letters, numbers, symbols, and pictures is carried out by using the heat sensitive agent in a printing unit of a computer printer. SOLUTION: In the concealment printing system, the concealment notation of letters, numbers, symbols, and pictures is carried out by using the heat sensitive agent in the printing unit of the computer printer. The printing system comprises an input device and an ink printer having an ink unit for concealment printing of a heat sensitive agent depending on a controlling device. The concealment printing system using the heat sensitive agent further comprises a printing control means for printing concealment information such as letters, numbers, symbols, pictures or the likes by concealment printing that is not visible when printed and develops colors in response to pressing or rubbing. COPYRIGHT: (C)2007,JPO&INPIT
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