Near infrared spectrography of colorants for offset printing with individualized rasters on drug packaging
Safety graphics on packaging are presented through infrared colorants according to the recipe for VZ twins for offset printing. The mathematical model of the individual shape of raster elements, “the four horns” (FR), is presented here for the first time, along with the performance solution in PostScript. Safety procedures have been expanded with the print of linear graphic elements by using low resolution rasters on the verge of recognizability. Visual design (V) is shown and transformed into near infrared spectrum (Z) using the method of digital animation. The presentation is based on the methods of creating animated movies by combining around twenty photographs which were made using a forensic camera with light filters for the range from 400 to 1000 nanometers. The visual and near infrared absorption of sunlight from print samples is shown in continuity, including the Z1 and Z2 area of wavelengths.
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