Wyniki wyszukiwania - BazTech

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Wpływ rozmiaru kodu QR na otrzymywaną jakość kodu wykonanego za pomocą urządzeń drukujących metodą elektrofotograficzną

Gołota B., Śleboda P.

Acta Poligraphica

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2016

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Vol. 7

21--35

EN

The QR Code is modular. Data in QR Code is represented by dark and clear square modules – single square-shaped cells (pixels). The article presents the calculation of minimum QR Code sizes printed with various electrophotographic printing devices to obtain minimum acceptable quality using the code verifier. For the research purposes, two test QR Code images with different sizes were created. The first image contained Web page address http://www.cobrpp.com.pl and was used six times with different sizes. The other image contained the coded vCard: COBRPP Centralny Ośrodek Badawczo-Rozwojowy Przemysłu Poligraficznego ul. Miedziana 11, 00-958 Warszawa 226208070 cobrpp@cobrpp.com.pl www.cobrpp.com.pl and was used seven times in different sizes. Test images were printed with seven different electrophotographic devices using the same 600 dpi print resolution. Those prints were then verified for code quality and readability using the Label Visions Systems INTEGRA 9510 verifier according to ISO/IEC 15415 standard. During the measurements, height and width of the single cell as well as entire code was checked. The research leads to conclusion that minimum code size to obtain acceptable quality level depends, among other factors, of the module size increase in print versus the digital original, which is different for different printers.To find out the minimum module size to be safely printed on any given device, this increase must be measured, or otherwise different code sizes must be experimentally verified for acceptable quality.

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Investigation on lineworks printed with different types of flexographic printing forms for purposes of printed electronics

Krzyżkowski J., Dąbrowa T., Hamerliński J., Śleboda P.

Challenges of Modern Technology

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2015

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Vol. 6, no. 3

3--9

EN

Nowadays one can observe fast development of materials and technologies dedicated to inexpensive mass production of electronic devices with conventional printing techniques. One of them is flexography. In this paper investigation on quality of lineworks printed with flexographic printing technique for purposes of printed electronics is presented. There was analysed influence of different printing forms on printed elements reproduction accuracy. Results obtained with conventional graphic ink with commercially available conductive ink were compared as well. Aspects which should be taken under consideration when implementing flexography to printed electronics applications have been specified.

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Badanie odwzorowania elementów kreskowych w technice wklęsłodruku przy użyciu cylindrów formowych grawerowanych mechanicznie z zastosowaniem różnych metod i parametrów

Dąbrowa T., Hamerliński J., Hoppe J., Krzyżkowski J., Śleboda P., Wojciechowski M.

Acta Poligraphica

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2014

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Vol. 3

9--27

EN

Gravure printing is used for high-volume production of high quality magazines and packagings. The method of printing form preparation, while satisfying the requirement for uniform and ink transfer and low image granularity, restricts the precision of linework elements, especially those used in securities and special printing. To overcome this problem, novel engraving methods have been developed. The Paper presented deals with the quality of linework reproduction using different combination of engraving parametres. The quality was assessed by printing a prepared test image containing commonly used linework elements, while using forms engraved with different parametres combinations. A printout with standard engraving parameter set was used as a reference point. Line separation, details reproduction, image resolution and ink optical density were measured to quantify the results. Printing parameters were identical for all samples. It was found that engraving parametres have negligible influence on text readability, but other linework elements, e.g. microlines, Landolt rings and concentric circles, may differ significantly if printed from a form engraved with different parameters. Moreover, the linework element reproduction depends on relation of element direction and engraving direction, as well as the convergence of engraving screen and linework elements’ distance. The minimum linework thickness required for stable reproduction for all electromechanical engraving methods and parametres was found to be between 100 and 150 microns.