| 摘要 |
<p>A representing utensil for use in making an invisibly depicted matter visible again which houses a coloring assistant in its own container is disclosed, wherein the coloring asistant is able to make a colorlessly depicted matter develop color and, after its coloring, do the short-time fading at which time the color is losen of itself in a relatively short time by acting on the depicted matter with the aid of a coloring agent, and further is able to make the depicted matter do repeat the coloring and short-time fading each time when the coloring assistant acts on the depicted matter a plural number of time. <IMAGE></p> |
