| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a printed matter which is useful for lotteries and is excellent in productive efficiency by forming a printing layer, on a coated paper, having a hue equivalent to that of the coated paper and a hardness lower than that of a coat layer of the coated paper. SOLUTION: As a printing ink for forming a printing layer having a hue equivalent to a hue of a coated paper and having a hardness lower than a hardness of a coat layer of the coated paper, a white pigment is used when the coated paper is white. For the white pigment, a material having a hardness lower than that of the white pigment to be used for the coated paper is selected. Although it is preferable that the hardness of the white pigment is lower than that of metal of coins, a hardness having the following relation may be applied: hardness of coated paper > hardness of printing layer > hardness of metal of coin. It is also possible to develop images by generating differences in coloring. By printing on the coated paper coated with a white color by the printing ink having the equivalent hue (white color etc.), a printed matter such as a lottery which can be produced at a high efficiency can be obtained.</p> |
