Flashing microtext that, when viewed with the unaided eye, appears to be part of the line design, bet under magnification is seen as a repeated pattern of words, codes or numbers.
通过使用微缩,来增加防伪特征。
微缩
,在没有使用放大镜
情况下,看到
只是
条线,而在使用放大镜观看时,可以看到连续重复
、
码及数
等。