Browsing by Author "Kalchev K."

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    STUDY OF THE COLOUR GAMUT VOLUMES AND OTHER REPRODUCTION QUALITY PARAMETERS OF ELECTROPHOTOGRAPHICAL DIGITAL PRINTING SYSTEMS
    (2022-01-01) Spiridonov I.; Yordanov S.; Boeva R.; Kalchev K.
    The main purpose of this article is to study the various quality indicators of industrial electrophotographical digital printing systems. Several test forms with a large number of test charts and various control elements were printed on the aforementioned digital printing and media systems. For the purpose of the study, one of the most common print media was used-mat and glossy coated papers, uncoated papers, Brigh foil gold, Martele Blanc paper, MC Primecoat, PP Silver, etc. with standard colour profiles FOGRA 39 and FOGRA 51 and offset uncoated paper with standard colour profiles FOGRA 29 and FOGRA 52. Colour gamut (2D and 3D), colour volumes, colour differences, etc. were studied. ICC profiles for specific printing systems and materials have been generated and their 3D volumes, 2D areas of different sections in light, medium and dark tones have been studied. Other indicators of the quality of reproduction have been studied, such as-achieved colour differences in relation to the set / desired colour and ISO standards, accuracy of reproduction-colour and geometric, grey balance TVI, etc.