| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the visibility of an information storing unit and to more appropriately read the information stored in the information storing unit. <P>SOLUTION: In the game card 100, various kinds of information is stored in a barcode 21 formed in a card body 1, and the stored information can be read by an infrared reader. An ink layer 22 including ink which transmits infrared rays is formed on the surface of the card body. The barcode is formed on the surface of the ink layer and includes at least one bar portion 211 including carbon which absorbs infrared rays. The ink layer includes a first ink layer portion 221 formed by using cyan (C) ink, magenta (M) ink and yellow (Y) ink other than black (K) ink approximately at equal ratios respectively, and a second ink layer portion 222 formed by using black (K) ink, so that the difference in the density between the bar portion of the barcode and the other region is reduced to reduce the visibility of the barcode. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
