| 摘要 |
PURPOSE:To obtain a recording paper on which images of characters or the like can be directly drawn by scanning light. CONSTITUTION:The paper has a color-changing layer which shows color in a normal state and changes into colorless and transparent with irradiation of light of specified wavelength, and a base layer 11 having different color from the color-changing layer 12. The color-changing layer 12 consists of a mixture of at least cyanine dye IR820B particles 12a and org. baron ammonium salt 12b. The specified wavelength is 820nm near infrared ray. |
