| 摘要 |
PURPOSE:To obtain a thermally color-forming process printed matter developing a clear and light tone of a high color-forming density with a proper color- forming balance between colors at the time of color-forming. CONSTITUTION:Yellow, cyan, magenta, and black fine capsule pigments each contain three essential components, i.e., an electron donative color-developing organic compound (a), an electron accepting compound (b), and a medium (c) for reacting the components (a) and (b) with each other. Each of thermally color-changing ink is prepared by dispersing the fine capsule pigment in a printing ink vehicle. In a thermally color-changing process printed matter obtained by lap-printing the thermally color--changing ink using color separation plates, a specific compound is compounded as the component (a) for every color. |
