Klaudio Pap

Infrared hidden CMYK graphics

Abstract The article presents a further development of new method of carrying out security graphics by programming color mixing for two separate wavelength areas. The first image is observed in daylight only, and the other image is observed separately under infrared (IR) light. Two independent graphics, two different pieces of information may be texts, vector or pixel images, and graphics generated by algorithms. Both images are printed simultaneously with CMYK printing inks only. In the near infrared range there are significant transitional phenomena that were not researched and targeted or applied. Many new measurements have been conducted describing the general relationship to set a new separation theory that has the goal of introducing the properties of infrared light in the reproduction of images. Targeted creating of two images is supported by the method of detecting their authenticity. The proof of the original print includes the characteristic of CMYK working spaces being device dependent. The application is in the security area on all graphic products, securities, documents, printed matter, packaging material, plastic products, works of art protection, product declarations, textiles and leather security, including brand protection.

Optimisation of automatic variable graphic layout and imposition

Original scientific paper The benefit of automation in graphic prepress lies primarily in an increase of efficiency in the production of layout and imposition of repetitive tasks by shortening lead time. Another benefit is cost reduction, since more work can be done with fewer staff members. One way of automating is by using scripts. Scripts can be written to execute just one task, complex scripts can perform multiple tasks and some scripts automate the entire publishing process. With scripts that execute complex tasks execution period can be time consuming. This paper describes the script that was made to automate variable data layout, imposition and to number digital printing. Quantitative research was carried out in this paper to determine achieved automation and time reduction by using automated processes. This paper also deals with written script optimization in order to shorten the time of its execution and to identify factors that affect the script execution time.