| 摘要 |
PURPOSE:To improve such properties as reproducibility in cyan color, coloring density, clear visibility and various fastnesses by using the mixture of the dyes expressed by three kinds of specified formulas for the dye of a dye layer, and setting the L*a*b* values of transferred coloring hues in the vicinities of SWOP (standard colors of standard four-color process inks) points. CONSTITUTION:The dye of a dye layer, which is formed on one surface of a base material sheet, is made to be mixture of the dyes expressed by the three kinds of formulas shown in the figure. For the mixture, the L*a*b* values of the transferred coloring hues are set in the vicinities of SWOP points (L*=53.9, a*-22.9, b*=-37.1). When L* is 51-57, a*=-25 to -21 and b*=-39 to -35 are set. The mixing ratio of the dyes is set in the following relationship. Namely, when the dye of the second formula containing NHCH3 is made to be a part (x), 0<=x<=37 is set; the dye of the third formula containing NH2 is set as dye=(12-0.375x) to (15-0.405x) (0<=x<=32) and 0 to (15-0.405x) (32<=x<=37); and the dye of the first formula containing NHCOCH3 is set as dye = first formula + second formula + third furmula =100. |
