engleski

The Influence of the Extreme Thick Applied Layers of Varnish on Colour Properties of LED UV Curing Inkjet Prints

The increase of the aesthetic value of the printed products is often performed so that the existing layers are covered with the additional ones. By thicker application of LED UV drying varnish based on acrylates and on two component polyurethane it is possible to create the additional effect, not considerably losing the original tonal value of the prints at the same time. Unfortunately the existing of the thicker layer results in the change of original tonal values. In this work the prints on the self-adhesive vinyl material which were printed on the LED UV Inkjet printer Roland LEC 300 were analyzed. With the aim of achieving better mechanical and optical properties the prints were additionally refined with the transparent polyurethane resin and with UV drying varnish. Based on the measurement (X-rite DTP 20) the gamuts of reproductions were created. The additional analysis of the reproduction of CMYK_RGB patches in the area of 100% and 50% tone value. With the intention to eliminate influence of the applied layers, with application of Techon spectrophotometer and densitometric and spectrophotometric correction factors. In this way the prints with the added embossing effect with UV varnish and DOOM effect with polyurethane would be more natural.

LED UV Inkjet; Extreme Thick Layers;

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