| 摘要 |
PURPOSE:To make fog which occurs during the elapse of time invisible by printing a heat sensitive coloring film containing a component which is colored by heating on the surface of a heat sensitive material provided on a supporting body by printing ink whose tone has complementary relation with the coloring tone. CONSTITUTION:The heat sensitive recording material is obtained by forming the heat sensitive coloring layer including coloring material and acidic material or phenol material which colors the coloring material by heating as a coloring agent on the supporting body. In this heat sensitive recording material, the pattern printing is performed on its surface by using the printing ink whose tone has the complementary relation with the coloring tone. In this method, even though the fog occurs during the elapse of time, the fog is hard to be sensed by the eyesight, and the density of the coloring material need not be decreased. Therefore sensitivity is not decreased, and the degradation of quality of the heat sensitive material can be effectively avoided. |
