International Journal of Science, Engineering and Computer Technology

Vandana Gupta ¹, Bijender ¹, Ankit Boora ¹

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

Abstract

Objective of this paper is to investigate major causes of machine downtime in Web-fed Offset Press Organizations and hence find out the best optimization strategies for downtime. Web-fed offset is a type of offset printing in which a continuous roll of paper is fed through the printing press. Even very high speed presses upto 75000 IPH have come to exist with full automation, still machine downtime is a strong point of concern among most of printers. Machine downtime is a period of time that a system fails to provide or perform its primary function and machine stops causing reduced efficiency of machine. The downtime data was collected on daily basis in consecutive three months February, March and April in Dainik Bhaskar Printing Press, Hisar. The results clearly indicated that downtime is caused mainly due to reel change and web break. Power failure, reel shaft puncture, operational mistakes, folder knife problem and web wrap around blanket are unperiodic and less prone still important factors to be considered by most of the printers.

Keywords

Reel Change ,web Break,power Failure,automation,downtime,wrap Around Blanket

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Anjan Kumar Baral ¹, Ankit Boora ¹

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

Abstract

Without printing it is very difficult to survive in today's world. Like all other inventions, printing has travelled a long way to reach to its present form and we are very fortunate to mention here that over the years, it has established its own identity in the world market in terms of technological advancements and production efficiency. Offset printing process is the one of the major form of printing in India as well as worldwide. It occupies more than 40 per cent of total printing systems and even the introduction of digital technology has not changed the scenario much in recent time. Makeready operation is one of the major areas which need special care and attention not only to reduce the time and energy but also to minimize the level of paper waste.

Keywords

Printed waste, Single colour sheet Fed offset press

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Anjan Kumar ¹, Ankit Boora ¹

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

Abstract

Mottling is the uneven appearance of print, particularly in solid areas, small dark and light areas appearing in the surface of paper or paper board. Print mottle is influenced by many parameters, but the most important one is the type of paper which is used for printing. Variations in the surface characteristics such as absorption and smoothness play an important role while analysis of the mottle. Print mottle can occur in sheet-fed offset due to several reasons related to both the paper and its coating and the printing press. The aim of the research work was to improve our knowledge of the influence on mottle related to the different paper surfaces (both coated and un-coated paper) in single colour sheet fed offset press. Both the coated and un-coated papers were used with different gram mage for printing with the help of a specially designed test form. The results from the print trials show that fountain solution from the previous printing unit can cause a decreased print density and dot gain. The structure of the paper coating, uneven porosity distribution has high influence oil water induced mottle while the effect of the surface chemistry is low.

Keywords

Printer's Mottle, Ink trap mottle, Coated and Un-Coated paper

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Bijender ¹, Ankit Boora ¹, Swati ¹

Affiliations
1 Department of Printing Technology, G.J.U.S.&T., Hisar, Haryana, IN

Abstract

Reproducing correct colours in printing has been a point of strong concern among printers. Matching colour with original is the need of hour. But small difference in colour is always in the tolerance limit. ∆ E in offset printing process should be less than 2 as per standards. But in the digital printing no much research has been introduced regarding colour difference (∆ E). Objective of this paper is to find out ∆E in dry toner based digital printing on gloss coated paper. A master test chart was prepared using various tint patches, high quality test images and quality control strip produced using i1 basic pro. The test chart was printed in Digital Print Application Laboratory, Department of Printing Technology, GJUS&T, Hisar on Richo India Ltd. Digital Printing Press. The results indicated that ∆ E in dry toner based digital printing is comparable to sheet-fed offset printing on gloss grade coated paper stock.

Keywords

Digital Printing, Colour Difference, Gloss Coated Paper, Matte Coated Paper, Uncoated Paper.

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Ankit Boora ¹, Bijender Kaushik ¹, Ruby Rani ¹

Affiliations
1 Department of Printing Tech., G.J.U.S&T., Hisar, Haryana, IN

Abstract

Print Quality has been a point of strong attention among printer among India also it is highly sensitive point of debate among foreign printers. Objective of this research project work is to compare various quality control parameters in Dry Toner and Liquid Toner based digital printing presses available in local market. A master test chart was prepared having various elements such i.e. Colour Control Strip, CMYK- Solid Patches, G.J.U. logo as Graphic, Halftone images, Tint patches of different colours. The test chart was printed on Art Coated paper with the help of Dry Toner and Liquid Toner based digital printing presses available in local market. The test chart was analyzed to check the print quality with Spectrophotometer. The result indicated that Solid Ink Density was more in Black colour in Dry Toner based digital printing technique. Print Contrast was more in Magenta in Liquid Toner based digital printing technique. Dot Gain was maximum in Black colour in Dry Toner based digital printing.

Keywords

Dry Toner Digital Printing, Liquid Toner Digital Printing, Art Coated Paper, Solid Ink Density, Print Contrast, Dot Gain.

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Ankit Boora ¹, Sukhdev Singh ¹

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

Abstract

In this era of ever growing awareness for consistent demand by consumers it is important to standardize the process so that outcomes could be consistent. For the same standardization of each process is needed according to the standard laid by the organisation either locally or globally. If you have to deliver the product across the globe your priority should be to adopt global standards for your organisation and to get the process certified by independent agencies or body for your process as well as organisation also. There are some independent national or international bodies/federations to compete in the modern scenario which are looking forward for global printing standards to be established and putting their effects to make the thing happens globally. They are their efforts to produce standards for each and every small elements of a process. Aim this paper is to help the smalls scales or medium scale industries for adopting the standards.

Keywords

Flexography, ISO, Organization.

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