Micro anti-counterfeiting ：Hidden text content, increase security, 100 times more than the microscope to see the text.

With a resol

Micro anti-counterfeiting ：Hidden text content, increase security, 100 times more than the microscope to see the text.

With a resolution of 317500 DPI, the micro scale characters and micro patterns can be etched, and the hidden graphic contents can only be observed under a microscope of more than 100 times. The fineness is much higher than Ziyun micro words.