| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a scratching card which disables a visual observation of concealed information during the manufacture of the card and surely disables the the visual observation of the concealed information even after the manufacture of the card. <P>SOLUTION: The method for manufacturing the scratching card includes the steps of forming a scratching layer 12 on a card base material 11, then spraying gas to a surface of the layer 12, irradiating the layer 12 with a laser beam while cooling the layer 12, and thereby printing the concealed information 13 on a rear surface side of the layer 12 at the base material 11 side. <P>COPYRIGHT: (C)2004,JPO</p> |
