Global IP Services
Anti-counterfeiting pattern having optically variable structure and preparation method thereof
An anti-counterfeiting pattern having an optically variable structure, comprising lithographic lines and gravure blind embossed relief lines printed on a carrier. The lithographic lines are a set of lithographic curve lines having a curvature, the widths of the lithographic curve lines changing from thick to thin, or thin to thick. The gravure blind embossed relief lines are a set of curve lines corresponding to the lithographic lines, and having the same curvature. The relief lines are overprinted on the lithographic lines with a width variation identical to that of said lithographic lines. Accurate overprinting of the two printing types forms a curved relief structure wherein the width of the lines changes continuously. When a printed product is rotated and observed, a continuously variable optical effect will be seen, which is visual, readily to identify, anti-copying and difficult to forgery.
CHINA BANKNOTE INK CO., LTD. CHINA BANKNOTE PRINTING AND MINTING CORPORATION
B B B D B B B B B D B B
B41M B41M B42D D21H B41M B42D B42D B41M B42D D21H B42D B41M
additional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional inventional
Shifan Qingfei Xiaoquan Xing Guolin Yong
Zhang Meng Zhou Zhang Yuan Zhang