A study on the assessment of quality of printed sheets in offset sheet-fed printing
Main Article Content
Abstract
The quality parameters of printed sheets should be controlled constantly during the sheet-fed offset printing process. This allows the detection of any problems in the initial stages of the printing process. The final control of the quality of printing sheets will eliminate error products before delivering to the costumers. The results of this control should be analyzed continuously. The total quality management (TQM) is an effective method in controlling, doing statistics, and assessing the errors in the offset printing process. Simultaneously, this method delivers the main errors frequently occurred in the printing process. This paper presents the possibility of using some tools of the TQM method such as Pareto chart, Ishikawa diagram, and 5xWhy to analyze and assess the quality of printing sheets in sheet-fed offset printing. The studied results show that the two main errors of the printed sheets are hickeys (occupied 29 %) and low density (occupied 17%). Moreover, the causes of hickey error are analyzed and shown in this paper.
Keywords
Quality of printing sheet, offset printing, quality assessment, quality management
Article Details
References
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[2] Jelena Kiurski, Ivana Oros, The influence of pH/conductivity of fountain solution on dot circularity, line and text raggedness, Journal of Graphic Engineering and Design, vol. 3, no.2, 2012.
[3] Ivana Oros, The influence of physico-chemical parameters of fountain solution on print quality, International Journal of Modern Engineering Research, vol. 2, issue. 5, pp. 3585-3593, 2012.
[4] J. Lundström, A. Verikas, Assessing print quality by machine in offset colour printing, Knowledge-Based Systems, 37, pp. 70–79, Jan. 2013.
[5] Nandakumar M., Bose N., Offset Print Analysis with Mathematical Regression Model, Acta Graphica, vol 27, no 2, pp. 15-20, 2016.
[6] Rastko Milosevic, Nemanja Kasikovic, Dragoljub Novakovic, Miljana Prica, The Effects of Different Printing Pressure Level Application on Sheet-fed Offset Print Quality, Journal of Chemical Technology and Metallurgy, 49, 4, pp. 375 - 382, 2014.
[7] A. Verikas, J. Lundström, M. Bacauskiene, A. Gelzinis, Advances in computational intelligence-based print quality assessment and control in offset colour printing, Expert Systems with Applications, 38, pp. 13441–13447, 2011.
[8] Wolfgang Geisler et al, Printing press and device for the inline monitoring of printing quality in sheet-fed offset printing presses, United States Patent 7334520, 2008.
[9] Thomas Hendle and Gerald Josef Reinhard, Quality control system for the qualitative assessment of sheets, United States Patent 8973915, 2015.
[10] Faisal Talib et al, Pareto analysis of total quality management factors critical ro success for sevice industries, International Journal for Quality research, vol.4, no. 2, 2010.