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.
通过用微缩
,来增加防伪特征。闪烁的微缩
,
有
用放大镜的情况下,看到的只是一条线,而
用放大镜观看时,可以看到连续重复的
、
码及数
等。