| 摘要 |
PURPOSE:To obtain the titled sheet capable of expressing a wide range of colors and recording clear images with excellent color reproduction properties, by using such coloring agents that when the reflective density of the coloring agents transferred onto a recording paper is 1.3, the spectral reflectance y (%) of at least one of the transferred coloring agents is in a specified region on a diagram. CONSTITUTION:Each of coloring agents has a spectral reflectance in a specified region on a diagram. It is preferable that the coloring agent for yellow has a structure of formula I, the coloring agent for magenta has a structure of formula II, and the coloring agent for cyan has a structure of formula III. It is also preferable that the gradient of the spectral reflectance y (%) to ray wavelength x(nm) in a wavelength range of 400-530nm of the coloring agent for yellow is greater than 0.95x, the peak of the spectral reflectance in a wavelength range of 400-450nm of the coloring agent for magenta is on the longer wavelength side of not less than 415nm, and the peak value of the spectral reflectance in a wavelength range of 400-450nm of the coloring agent for cyan is not less than 60%. This color ink sheet is preferably enclosed in a cartridge provided with a contact window for transferring an ink layer onto a recording paper. A base sheet is preferably constituted of a polyester film 3-10mum in thickness. |
