| 摘要 |
A high offset printability can be achieved and mutual adhesion of forgery preventing members during a papermaking process becomes less prone to occur. A method of manufacturing a forgery preventing member includes forming a first adhesive layer capable of adhering to paper, on one surface of a sheet substrate which provides a forgery preventing effect, forming a second adhesive layer capable of adhering to the paper, on the other surface of the sheet substrate, superimposing the sheet substrate and a first water-soluble sheet or unsized paper with the first adhesive layer being sandwiched therebetween, superimposing the sheet substrate and a second water-soluble sheet or unsized paper with the second adhesive layer being sandwiched therebetween, and cutting or punching the sheet substrate on which the first adhesive layer and the second adhesive layer are formed with the sheet substrate being sandwiched between the first water-soluble sheet or unsized paper and the second water-soluble sheet or unsized paper, to produce a fibrous or flaky forgery preventing member. |
