| 摘要 |
PURPOSE:To make a coloring material capable of easy sublimation, not thermally decomposed under the operating conditions of thermal recording dots, have a hue favorable for color reproduction, have a high molar absorptivity and stable to heat, light, moisture, chemicals and the like and easy to synthesize, by using a specified cyan coloring matter. CONSTITUTION:A coloring matter of general formula (I) is used as a coloring matter for thermal transfer recording. The coloring matter has a clear cyan color, so that it is suitable for achieving full-color recording with favorable color reproduction properties when being used in combination with appropriate magenta and yellow colors. In addition, the coloring matter is easily sublimable, and has a high molar absorptivity, so that recording at high speed and with high color densities can be achieved without heavy duty on a thermal head. Further, the coloring matter is stable to heat, light, moisture, chemicals and the like, so that it is not thermally decomposed during thermal transfer recording, and the record obtained has excellent preservability. Since the coloring matter has favorable solubility in organic solvents and favorable dispersibility in water, it is possible to easily prepare therefrom a high-concentration ink through uniform dissolution or dispersion. When such an ink is used, it is possible to obtain a transfer sheet coated uniformly with the coloring matter in high concentration. |
