Modern Approaches in the Design of Sheet-Fed Offset Printing

2018

In order to stay competitive, printing companies need to continually improve their business, both in the technical and organizational fields. In this paper are presented some aspects related to the optimization of the technological processes of printing. Printed products such as magazines, brochures and notebooks are often made by offset technology. In order to achieve the actual printing, both web and sheet-fed printing machines are needed. The paper presents the initial version of the production workflow taking into account the available current endowment, both equipment and human resources of the printing house where the case study was conducted. After the study of the time required for each machine cycle, a new, automated production workflow was proposed. The advantages and disadvantages of each proposed option have been analyzed and criteria for optimizing the production flows have been established.

Abstract This study is intended to examine the operation of a sheet-fed offset press, the problems and their causes and the strategic management required to prevent operating problems or find possible solutions. A sheet-fed offset press is designed to print a single sheet of paper at a time. The problems encountered on a sheet-fed offset press are related to inking, dampening, operating, paper and machine maintenance. This study considers the relevance of make- ready and machine maintenance policy for printing companies. The dissertation also focuses on how strategic management decisions could prevent, detect or solve printing-related problems and how print quality could be improved so that customer satisfaction can be achieved. The research methodologies that will be used in this study are questionnaire and press observation.

Sheet-fed litho is commonly used for printing of short-run magazines, brochures, letter headings, and general commercial (jobbing) printing. In sheet-fed offset, "the printing is carried out on single sheets of paper as they are fed to the press one at a time". Sheet-fed presses use mechanical registration to relate each sheet to one another to ensure that they are reproduced with the same imagery in the same position on every sheet running through the press. Different types of printing substrates we can use in sheet-fed offset printing for production. Coated, Un-coated & Polypropylene (PP) substrates are considered during our research work. Aim of this study is to reduce the consumption and influence of printing substrates with the optimum utilization of printing substrates and explore the possible ways of optimum consumption of the printing substrates used in different sheet offset presses for different type of jobs. In this different type of p rinting substrates is study which are used in printing industries, different jobs of the " Akriti Printer " Noida " were taken into consideration. During project work jobs consuming moderate type of printing substrates were selected and the study was conducted on each selected job.

Sheet-Fed offset is one of the premier processes in India as well as abroad. To cope up with customers large quantity demands automation has become mandatory. From prepress to post press a wide range of automation techniques exist and coming forth for sheet fed offset presses. Objective of this paper is to throw light on various sheet-fed offset automation techniques existing today and their futuristic implications. The data related to automation was collected with the help of survey conducted in 15 printing organizations situated at Delhi NCR and Baddi (Himachal Pradesh) region. The data was collected with help of questionnaire consisting of 9 questions. Results indicated that in prepress the DI (Direct Imaging) presses can be the future. Drip-off, spot UV (Ultra Violet) effects job, UV double cotter machines, PDCS(Palomar distant cluster survey) automatic density measuring system, latest rotary machines, ACME folders and gluers and photopolymer plate for online spot UV are another few automation techniques which can play a big role in sheet-fed offset printing industry market.

Objective of this research paper is to put emphasis on various eco-friendly techniques existing today in sheet fed offset printing organizations and their futuristic aspects. Reducing pollution, decreasing carbon footprints and lowering volatile organic compounds have become essential today for various offset printing organizations for sustainable developments. To get aware of eco-friendly techniques coming forth, a survey of 15 printing organizations was conducted in Delhi NCR and BADDI (Himachal Pradesh) region. The data was collected with the help of questionnaire consisting of 8 questions. The result indicated that alcohol free dampening, IPA (Isopropyl alcohol) free printing, ETP (Effective and technically proven) and STP(Sewage water treatment) systems and Heidelberg carbon neutral machine are futuristic eco-friendly techniques, which can play significant role in coming time..

Annals of the Academy of Romanian Scientists Series on Engineering Sciences

The present paper presents a comparative analysis of two printing methods, namely: offset printing and digital printing. Specifically, the analysis involves identifying the constructive solutions of the printing machines, determining the technological phases involved in printing the same type of product - magazine, the length of time needed to make them as well as aspects regarding the quality of the print (optical density, dots gain, colors). The study was carried out on the MAN Roland 704 offset printing machine and the Ricoh Pro C9210 digital printing machine. This paper highlights technological aspects that will bring to light the best method for printing typographic products in the shortest time and of the highest quality

In sheet-fed offset printing technique, a sufficiently high contact pressure between blanket and impression cylinders needs to be applied for the proper ink transfer onto printing substrate. The aim of this research is to investigate dependence of various print quality parameters on three printing pressure levels applied, between blanket and impression cylinders, during four color sheet-fed offset printing process on matte-coated paper. This was examined by measuring various control elements of the prints, in order to obtain quantitative information about standard print quality parameters. Through the evaluation of this important printing factor and relating it to the print quality, it will be possible to find out in which ways and to what extents different printing pressue levels affect sheet-fed offset print quality.

Procedia - Social and Behavioral Sciences, 2012

The growing demand for sustainable business practices, life-cycle analysis and environmental product disclosure will impact e-reader manufacturers, digital media companies and purveyors of print media. Sadly, print has allowed itself to be commonly seen as an environmentally destructive medium, despite the fact that much of print media is based on comparatively benign and renewable materials. This is particularly ironic in that print has incredible potential to be a far more sustainable medium than it is today… and to become the means for printing flexible polymer digital electronics as well. With environmental concerns playing a large role in all kinds of manufacturing industries, the concept of sustainability remains elusive. There are many common steps a print factory can take to reduce the impact that carbon foot print have on environment. It is only with truly holistic approach towards environmental protection we can effectively reduce CO 2 emissions and bring down carbon foot print. While CO 2 is created in manufacturing of the printing press and of printed products, there are other significant emissions involved in a print production. Process waste includes energy, printing substrates, ink, dampening solution, blanket and wash up solvents, anti-set off powder need special attention. This study helps to find out solutions to make print industry green, rather a new concept "CO 2 NEUTRALISED PRINT" under the mantra "Think economically-print ecologically".

MATEC Web of Conferences

The paper analyses 4 printing technological flow cases, considering the author’s experience (over 15 years) in the printing industry to improve the production efficiency. The productivity, the quality and the delivery time are the main areas of interest for people working in the printing & finishing industry, where the print demand structure evolved and the costs of replacing machines are very high. The implementation of the organisational and reconfiguration of machines changes contribute to the development of new efficient working structures within the printing process, therefore increasing the efficiency of it, as one can notice from the diagrams presented in the paper. The time and the costs presented have been obtained through a couple of trials of modifying the work parameters, the colour and the materials according to the colour management guidelines in use. Ultimately the optimal technological structure has been chosen for quality improvement, cost and delivery time reduction.

MATEC Web of Conferences, 2021

In the printing industry, where production never stops, it is very important to continuously maintain machine performance. If a machine breaks down, the production will stop and it will disturb the production process. Therefore, the maintenance system must be managed efficiently to solve those problems. The paper presents the study results on continuous quality improvement of offset printing using preventive maintenance features. Offset printing is a process that involves a multitude of variables, independent and interdependent factors. The offset printing process was analyzed and the factors that have a significant influence on the quality of the process and the products made were identified. The defects that may occur during the printing process and the causes thereof have also been identified and the types of non-conformities of the end products were estabilished. The experimental method was used. The case study was conducted on Manroland 508. For the planning of preventive maint...