| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ink composition for a stencil transferring ink to the surface of paper, a cloth, etc., with the stencil, covering a handwriting on the substrate, making the handwriting invisible, decolorizing the stenciled surface by heating and making the handwriting such as a message in a covered and invisible part visible. <P>SOLUTION: The composition comprises a heat-decolorizable color pigment composed of spherical particles having≤10μm average particle diameter at 22-40 wt.% expressed in terms of solid concentration. The heat-decolorizable color pigment is composed of a color hiding a substrate letter when the color is developed. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
