Optical variable ink

Product brief introduction:
Optical variable ink is the most complicated intervention-type anti-forgery ink,the printing products using this ink has colorful metal luster in which color lump shows a pair of colors. Seen from the front or the lateral side under sunlight, the ink glows two different colors varying with the viewing angle.

Breed:
7000series:
s estion first prints the black bottom color, if does not print black bottom color have to use highly concentrated the printing ink. C ompared with the later two kinds has the metal sense of reality.
8000series:
have to print the deep colr bottom
9000series:
double change color must print the deep color bottom and the list changes color the printing white bottom.

the three kinds of optical variable ink has several colors.