To provide a recording medium which has image regions formed by using recording materials having different light resistance, the recording medium enabling degree of deterioration in an image having lower light resistance to be visually confirmed, and to provide an image forming device forming the recording medium.
An invisible image 12 and a visible image 14 are formed in the recording medium 10. The invisible image 12 is constituted of a first recording material. The visible image 14 includes: a first visible region 14A constituted of a second recording material having light resistance nearly equal to that of the first recording material; and a second visible region 14B constituted of a third recording material having light resistance higher than that of the first recording material. The second region 14B exhibits a color corresponding to any step of discoloration steps of the first region 14A.
MATSUBARA TAKASHI
HASEGAWA MASASHI
NAKASO YU
FURUKI MAKOTO
DEN TAMINORI
| JP2008224712A | 2008-09-25 | |||
| JP2007114223A | 2007-05-10 | |||
| JP2006079017A | 2006-03-23 | |||
| JP2006078888A | 2006-03-23 | |||
| JP2009091517A | 2009-04-30 | |||
| JP2001121792A | 2001-05-08 | |||
| JP2001281002A | 2001-10-10 |
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
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