Oblon, McClelland, Maier & Neustadt, L.L.P.
Information recording medium
An information recording medium having a front surface and a back surface has a first color developing layer, a second color developing layer and a third color developing layer. The first color developing layer develops yellow at a temperature not less than a first threshold value. The second color developing layer is arranged at the back surface side with respect to the first color developing layer. The second color developing layer develops magenta at a temperature not less than a second threshold value that is lower than the first threshold value. The third color developing layer is arranged at the front surface side with respect to the first color developing layer. The third color develops cyan at a temperature not less than a third threshold value that is higher than the first threshold value.
Toshiba Infrastructure Systems & Solutions Corporation Kabushiki Kaisha Toshiba
B B B B B B B B B B B B B
B42D B41J B41M B42D B41M B41J B41M B41M B42D B41J B42D B41J B41M
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Shota Fumitoshi Nobuki Takahisa
Kure Morimoto Nemoto Nakano