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Method for protecting from forgery assuring the authenticity of or personalized pre-printed sheets
Method for protecting from forgery assuring the authenticity of or personalized pre-printed sheets
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机译:防止伪造以确保真实或个性化预印纸真实性的方法
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PCT No. PCT/IT95/00185 Sec. 371 Date May 6, 1997 Sec. 102(e) Date May 6, 1997 PCT Filed Nov. 14, 1995 PCT Pub. No. WO96/14994 PCT Pub. Date May 23, 1996The method provides the protection or personalization of the pre-printed sheets by impressing microengravings, on all or some of the printed portions of the sheets, through an embossing process carried out on the pre-printed sheets at a temperature higher than the softening point of the dyeing substances used for obtaining the print thereon and followed by a cooling step, said microengravings corresponding to holograms or diffraction patterns or images or words.
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