| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method for an information medium capable of reducing printing steps without the risk of loosing the color balance in a color-printed printing medium as a whole. SOLUTION: Bar code patterns are arranged two-dimensionally with a pattern of a color corresponding to the lightness of black (such as brown) BP provided in the case of encoded data bit is '1', and a pattern of a color corresponding to the lightness of white (such as light blue) WP provided in the case the data bit is '0'. In the case the color distribution balance of the bar code patterns in the bar code is bad, the color of the corresponding bar code pattern is substituted another color while maintaining the lightness of the color so as to be printed on the surface of a paper, or the like. |
