2. Original printing product is almost unchanged,but after adding the high density grating, a clear pattern emerged, such as company logo, name and so on.
3. Rotated 90 degrees to see different patterns, multi-density hybrid encryption, so that counterfeiters exhausted.
4 .Doesn’t increase the printing costs.
5. a special pattern will be hidden in normal offset printing. suitable for printing anti-counterfeiting products, like company logo, namecard