| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printing method wherein printing is applied onto forms for various kinds of bills and checks to make them impossible to be copied by using a low priced printer on the market. SOLUTION: In printing a sum of money on a bill or a check, duplicate printing is applied so as to copy it clearly on a rear side of a form by permeation of ink and so as to stop the permeation of ink inside the form.</p> |
