| 摘要 |
<p>PURPOSE:To obtain a discolorable ink which is prepared by mixing an ink composition which can be decolorized or discolored with a specified chemical with another ink composition which does not decolorized with said chemical and has a color different from that of the former ink composition and is therefore adapted so that the color of the ink composition which is neither decolorized nor discolored with said chemical may remain. CONSTITUTION:This discolorable ink composition comprises a mixed ink comprising at least two ink compositions of different colors, wherein at least one of them is an ink composition which can be decolorized with a specified chemical (e.g., a black decolorizable ink composition which can be discolored with a bleaching agent), and the other comprises an ink compositions which is neither decolorized nor discolored with said specified chemical. When said specified chemical is added to this mixed ink composition, the decolorizable ink composition is decolorized or the discolorable ink composition is discolored to convert the color of the mixed ink to the color of the remaining ink compositions.</p> |
