| 摘要 |
PURPOSE:To prepare paper for preventing forgery fabrication which gives only copies of quite different color from the original, even when any copying machine is used. CONSTITUTION:In the paper-making process, brilliantly shining fine pieces 2 which can adhere to the substrate paper 1 are locally distributed. in strings on the paper surface. For example, a film which is soluble in hot water at 60 to 80 deg.C is vapor metallized on its one or both surfaces and the surfaces are further coated with a resin or a combination thereof with a coloring agent, then cut into fine pieces. The fine pieces are incorporated into paper sheets in strings on paper making process. |
