engleski

Individualization of Multi-Color Reproduction and its use for Security Graphic Solutions

Security printing is spreading in defining area of figure microstructure screening. New raster elements (RE) are included in figure by random choice of three parameters i. e. shape, frequency and angle. Reproducibility of experiment and its reproduction in professional use are ensured by programmable pseudo-random algorithm which generates a range of values to start screening. The first random number is derived from numerical information which is connected with the figure. By this way the same algorithm is used for all protected graphics but with different type of seed. Intervention of outer figure as a guide in choice of RE is presented in this work. Figure with initials was used because of several reasons. This figure is used to choose RE in referent and in original figure. Figure of initials is toned according to the values of density in original figure, and by this way additional protection is added to the integral reproduction.

security multi-color reproduction; security graphic solution; individualization of reproduction; new raster elements; stochastic choice of raster elements

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