Anti-scan / anty-copy pattern
An image constructed of parallel and multidirectional fine lines or raster units. The pattern parameters (direction, width of strokes and the distance among them) impedes reproduction of the images by copying equipment which can be seen as moire or a darker (lighter) text compared with the background (fig. 1, fig. 2).
Fig. 1. Offset with rainbow printing.
10 Turkish Lira (2005)
Fig. 2. Offset.
5 Uzbekistan Sum (1994)