Background Pattern
An image or an ornamental pattern which is a background for other images, serial numbers, text, etc. It makes document fraud more complicated as in case of mechanical erasure or etching of either text data, or security features, the background pattern is damaged.
The background pattern consists of:
- thin parallel or intertwined lines that can have variable thickness and form pseudo-three-dimensional elements due to line curves (regular grid). The lines of the grid may be of one color or multiple colors;
- microprinting;
- design elements formed by solid colors;
- special raster elements, anti-copy and guilloche patterns.
Background patterns are printed by offset, rainbow and Orlov printing.
a
b
Fig. 1. Belarus. Diplomatic passport issued in 2010:
a — page 31. Paper substrate; b — the same. Background pattern in the form of a straight-line grid. Rainbow printing
a
b
Fig. 2. Tunisia. Diplomatic passport issued in 2003:
a — back endpaper. Paper substrate; b — the same. Background pattern with pseudo-three-dimensional elements formed by intersecting lines. Rainbow printing
a
b
Fig. 3. Kuwait. Passport issued in 2005:
a — front endpaper. Paper substrate; b — the same. Background pattern formed by solid colors. Rainbow printing
a
b
Fig. 4. Moldova. Permanent residence permit for persons without citizenship issued in 2016:
a — polymer substrate; b — the same. Background pattern formed by microprinting. Rainbow printing