Informatics Publishing Limited

A. K. Baral ¹, Bijender ¹, Mohit Kumar ²

Affiliations
1 Department of Printing Technology, GJUS&T, Hisar, IN
2 Print & Graphic Communication, GJUS&T, Hisar, IN

Abstract

The paper industry is continuously and consistently improving paper quality and printability in order to meet higher printer and consumer standards. One key to improve print quality is to have a suitable coating on surface empirically so as to derive the mechanisms that improve final print quality. The technology to characterize paper coatings has evolved rapidly over the past several years. This technology is reviewed here in the context of coating component identification, the internal structure of coatings, physical and optical properties of coating surfaces and printability. The premise of this review is that techniques discussed here are applicable to coating pigments, coating formulations, end user properties and final performance on a typical multicolour printing press.

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A. K. Baral ¹, Bijender ¹, Ravinder ²

Affiliations
1 Department of Printing Technology, GJUS&T, Hisar, IN
2 Print & Graphic Communication, GJUS&T, Hisar, IN

Abstract

In today's competitive climate, high productivity sheet fed presses play a crucial role in meeting turbulent printers demand and profitability. One approach to improve productivity is to reduce machine set up time using effective makeready operations. This session will act as a roadmap to set up effective makeready keeping in context the plate mounting, cleaning, sheet change, plate and impression adjustments, ink setting and speed adjustments. The effectiveness in makeready operations leads to some visible and non visible actions that when integrated with automation and management methodology provides novel techniques that improve machine productivity.

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A. K. Baral ¹, Mohit Kumar ², Sunil Kumar ³, Nitin Kumar ³

Affiliations
1 Department of Printing Technology, GJUS&T, Hisar, IN
2 Print & Graphics Communication, GJUS&T, Hisar, IN
3 TCIRD, Yamunanagar, IN

Abstract

The properties of the coating colour and the final coating depend a lot on the pigments used in the coating colour. When choosing pigment for a certain product, the product specifications that must be considered are brightness, gloss and opacity and ink absorption. The rheological properties of coating colour greatly affect the runnablity of paper. The morphology of the pigment particle affects the properties of the coating colour and the final coating.

Keywords

Pigment, Coated Paper Quality.

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A. K. Baral ¹, Nishant Kumar ¹, Sunil Kumar ², Nitin Kumar ²

Affiliations
1 Department of Printing Technology, GJUS&T, Hisar, Haryana, IN
2 Department of Coating and Printing, TCIRD, Yamunanagar, IN

Abstract

For manufacturing point of view, to attain a coated paper of best performance, selection or optimization of base paper properties is necessary. Base paper characteristics like roughness, porosity equally contribute as pigment properties. The quality of coated paper is majorly influenced by the properties of base paper. A base paper property defines the final coating structure, its optical efficiency, and the resulting coated paper performance and printability. Final coated paper decides the printability result by its coating Structure, optical efficiency, which is also influence of base paper.

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A. K. Baral ¹, Ravinder ¹

Affiliations
1 Department of Printing Technology, GJUS&T, Hisar, IN

Abstract

"Make-ready" refers to everything done on a press to prepare for the final print job. This includes selecting the proper, setting up the plates, and preparing the printer for the chosen paper size and weight. Making everything right during make-ready helps to ensure a quality print run. This step would be considered finished when the printer is satisfied with a print, and can therefore begin the actual print run. So any mistake or any loose point in the make ready would provide cheap quality print and ultimately lead to the loss of time and money. So to ensure best quality print and smooth run on press effective make ready is to be implemented. From this study it was found that two colour machines consumes more time for make ready. And three major components are Plate Mounting, Machine Setting for OK Sheet, Registration and Colour Matching. These three points need special care and attention in order to optimize makes ready time. Innovative techniques should be followed in order to reduce plate mounting time. And colour management system also should be followed to reduce time for press adjustment for OK sheet.

Keywords

Make ready Optimization, Offset Printing

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