| 摘要 |
PURPOSE:To reduce variations in then concentration of solids and enable a coloring agent to be uniformly dispersed, by coating a base with a coating liquid prepared by mixing a heat-fusible substance containing a coloring agent into an organic solvent, and evaporating off the organic solvent. CONSTITUTION:A coloring agent which is solid or semi-solid at room temperature and is dissolved or dispersed in a binder resin is a coloring material layer when being melted is incorporated in a coating liquid. The coloring agent may be a dye such as a direct dye and an acidic dye or a pigment such as carbon black and anthraquinone. A heat-fusible substance may be paraffin wax, Japan wax or the like. Further, gelatine, polyvinyl alcohol or the like is incorporated in the coloring material layer. Per 100pts.wt. of the coloring material layer, are used 50 to 90pts.wt. of the heat-fusible substance, 5 to 20pts.wt. of the coloring agent and 0 to 3pts.wt. of resins. A solvent such as toluene is used together with the above components to prepare the coating liquid, which is applied to a base such a coated paper by solvent coating, and the solvent is removed to obtain the coloring material layer. |
