Enhance Printing quality of additional special colors by using variables of AM screens (Applied to folded carton packing)

Document Type : Original Article

Authors

1 Designer in Banknote Printing House &Central Bank of Egypt

2 Professor of Quality Control and Quality Control, Department of Printing, Publishing and Packaging, Faculty of Applied Arts, Helwan University

3 Assistant Professor, Printing, Publishing and Packaging Department, Faculty of Applied Arts, Helwan University

Abstract

Traditional Digital Screens have a great role in Packaging printing because they have good economic conditions in processing and most printing houses can be used and preparation in normal operating conditions.
The search problem is that there are problems in printing of additional special colors by using AM Screens, especially with printing packages with ( 5 colors to 8 colors )
In this search, we discuss packages with seven colors
Aim of the search :
- Using AM Screen to print spot colors to achieve quality .
- Enabling AM Screen to print spot colors without needing to FM Screen
- To achieve this ,we make this search , which includes the theroretical side and the practical side , we make it through the Arab and English references and electronic sites as practical experience .
an introduction
Continuous images are converted to web images using traditional AM networks, FM networks, hybrid networks.
Dot format, LPI, DPI are all terms that describe the process of transforming images Continuous Continuous Tone into halftone silhouettes for printing.
What causes color differences is the dots of different size or frequency rather than the various shades of black and white. The grid point is configured using three different technologies: traditional network technology (AM), frequency modulated (FM) technology, hybrid technology. Both of these technologies can be used to create shades of gray, but many times one is preferred. "Systems of networked systems should be enhanced for the printing process, and a certain network technology may enhance the ability to reproduce the image satisfactorily.
The digital network is an algorithm process that results in the continuous bitmap image (the con- tone images) being formed from an ordered body of small binary bitmaps. As a result of "computer-to-computer techniques" such as computer to film (CTF), computer to board (CTP), and computer to the printing / printing machine, there are no virtual limits to the practical application of different point-of-point configurations. The digital network simulates the color gradient values ​​of the original components with points collected from the individual small image elements (pixels: image elements). The more the output device (Film Image Setter), the CTP or computer hardware The more accurate the reproduction of the point format of the analog AM scan (1)

Keywords

References

 Oliver , Garth Ray, APPARENT QUALITY OF ALTERNATIVE HALFTONE SCREENING WHEN COMPARED TO CONVENTIONAL SCREENING IN COMMERCIAL OFFSET LITHOGRAPHY- In Partial Fulfillment of the Requirements for the Degree Doctor of Education Vocational/Technical Education - December 2007 .
 .Gevaert , sublima , Advanced Screening for the 21st century , sublima ., Agfa –, 1999.
Campbell  , Cecilia,)    so long, moire, hello, stochastic) , vol . April ,Primedia company ,USA,2003 .
Pinćjer    , Ivan -  Development of FM screens - University of Novi Sad, Faculty of Technical Sciences, Department of Graphic Engineering and Design, Serbia- Journal of Graphic Engineering and Design, Volume 3 (1), 2012
https://www.fogra.org/index.phpvar1=en&var2=fograstandardization&var3=fogracharacterizationdata&var4=fogra-characterizationdata-downlo- December 2016- 10 pm

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