| 摘要 |
PURPOSE:To prevent the migration or offset phenomenon of desensitizing ink by allowing silica (SiO2) to be present either one of the region in a developing layer, the region between the developing layer and a sheetlike support and the region in the sheetlike support. CONSTITUTION:Silica (SiO2) is allowed to be present in either one of the region in the developing layer of a developing sheet, the region between the developing layer and a sheetlike support and the region in the sheetlike support (may be allowed to be present in two or more regions). As silica (SiO2) to be used, a silica powder capable of being obtained usually may be used but amorphous silica is especially effective. Therefore, when desensitizing ink is applied to the developing sheet, it is usual to apply an excessive amount of the desensitizing ink (that is, a desensitizing agent) and the excessive desensitizing agent (liquid) becomes a state present in the gap of a coating layer or/and a support sheet (base paper) but said desensitizing agent is, so to speak, a free fluid and freely transferred and diffused. By this method, the trouble of color forming inferiority due to the migration or offset of the desensitizing agent can be avoided. |
