Abstract: The safety design printed on a currency paper is composed, on the one hand, of a basic design with parallel lines (10, 20, 30) extending in a specific direction, with a plurality of interruptions, by means of which regions in the form of letters are marked out, and of a plurality of line segments (1, 11, 21) which fill these regions. A plurality of groups (R to Z) of letters located next to one another respectively form a word. Within each group, all the line segments are parallel to one another, but from word to word the directions of the respective line segments differ from one another, so that there is a plurality of words with line segments inclined differently in relation to the direction of the basic-design lines. Mutually adjacent successive lines of the basic design and mutually adjacent successive line segments have alternately different colors, preferably three different colors being represented.

Abstract: The document of value is provided with a safety design extending on one portion or the whole of its surface. The entire surface of the safety design consists of juxtaposed groups of segments of raised parallel lines of two different heights forming high reliefs and low reliefs portions. The segments of two adjacent groups are parallel to two predetermined directions, preferably substantially perpendicular. The assembly of segments parallel to one of the directions and consisting of high reliefs on the whole or part of their length define a transitory image visible when the document is illuminated or observed parallel to a direction perpendicular to said segments and forming an acute angle with the plane of the document of value. A second transitory image is formed in a similar manner by high relief segments parallel to the other direction. The low raised segments or segment fractions constitute the background of the safety design.