Security support printed with micro-pattern preventing document forgery when using high-precision copiers

摘要

A support of paper or the like is imprinted with a security micropattern which prevents falsification of documents printed on the support by use of high resolution copier machines. The security micropattern is printed with ink which is transparent or of the same coloration as the support. The ink comprising the micropattern is either non-absorbent or hydrophilic, and the ink used for inscribing on the support is either hydrophilic or non-absorbent, respectively.