Optimization of a reverse-offset printing process and its application to a metal mesh touch screen sensor

Purpose The purpose of this paper is to investigate the influences of fibre lengths and a given range of paper grammages on the fundamental properties of unprinted and printed papers by using mineral oil-based offset printing inks and also evaluate these results in terms of printing and tensile characteristics. Design/methodology/approach A design research approach has been based on the production of various laboratory handmade papers and their printing process with mineral oil-based offset printing inks. The analysis of mechanical and structural tests results of the unprinted and the printed papers have been evaluated. Findings This study is confirmed that the mineral oil-based offset printing inks can be easily applied to the surface of papers having different grammages and pulp contents. An increase was observed in the tensile index values of the papers with the printing process, and these increases were more evident (about 80%) particularly in low grammage papers having high short fibre content. Originality/value The originality of this work is based on understanding and comparing the effects of grammage and the effect of pulp contents (having long and short fibre) on tensile characteristics of printed and unprinted handsheets.

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Al-Based Metal Mesh Electrodes for Advanced Touch Screen Panels Using Aluminum Nitride System Optical Absorption Layer

IEICE Transactions on Electronics ◽

10.1587/transele.e98.c.1000 ◽

2015 ◽

Vol E98.C (11) ◽

pp. 1000-1007

Author(s):

Mototaka OCHI ◽

Yoko SHIDA ◽

Hiroyuki OKUNO ◽

Hiroshi GOTO ◽

Toshihiro KUGIMIYA ◽

...

Keyword(s):

Optical Absorption ◽

Aluminum Nitride ◽

Touch Screen ◽

Metal Mesh ◽

Absorption Layer

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16.2: Reverse-Offset Printed Single-layer Metal-Mesh Touch Screen Panel

SID Symposium Digest of Technical Papers ◽

10.1002/j.2168-0159.2014.tb00054.x ◽

2014 ◽

Vol 45 (1) ◽

pp. 197-199 ◽

Cited By ~ 6

Author(s):

Young-Man Choi ◽

Kwang-Young Kim ◽

Eonseok Lee ◽

Taik-Min Lee

Keyword(s):

Single Layer ◽

Touch Screen ◽

Metal Mesh

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Analysis and prediction of Moiré pattern on metal mesh touch screen based on two dimensional Fourier transformation

Displays ◽

10.1016/j.displa.2021.102060 ◽

2021 ◽

pp. 102060

Author(s):

Yuyang Su ◽

Zhile Wang ◽

Lubin Jing

Keyword(s):

Fourier Transformation ◽

Touch Screen ◽

Two Dimensional ◽

Metal Mesh ◽

Moire Pattern ◽

Moiré Pattern

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Fabrication of transparent metal mesh electrode by using silver-metal oxide nanoparticles for application to touch screen panel

Molecular Crystals and Liquid Crystals ◽

10.1080/15421406.2017.1338076 ◽

2017 ◽

Vol 651 (1) ◽

pp. 163-169 ◽

Cited By ~ 2

Author(s):

Gun-Woo Lee ◽

Sang Bo Sim ◽

Lee Soon Park ◽

Su Yong Nam

Keyword(s):

Metal Oxide ◽

Metal Oxide Nanoparticles ◽

Touch Screen ◽

Oxide Nanoparticles ◽

Metal Mesh ◽

Silver Metal

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Environmental impact of printing inks and printing process

Journal of Graphic Engineering and Design ◽

10.24867/jged-2020-2-011 ◽

2020 ◽

Vol 11 (2) ◽

pp. 11-17

Author(s):

Cem Aydemir ◽

◽

Samed Ayhan Özsoy ◽

Keyword(s):

Organic Compounds ◽

Ground Level ◽

Printing Industry ◽

Offset Printing ◽

High Concentration ◽

Negative Effects ◽

Glycol Ethers ◽

Printing Process ◽

Printing Inks ◽

The One

In the Printing Industry, printing inks, varnishes, lacquers, moistening solutions and washing solvents (ethanol, methyl acetate, ethyl acetate, isopropanol, n-propanol, hexane, benzene, toluene, xylene, isopropyl acetate, propyl acetate, dimethyl ketone, glycols and glycol ethers) contain volatile organic compounds (VOCs) and air pollutants (HAPs). Especially solvent based inks used for flexo, gravure and screen printing, offset printing dampening solutions and cleaning solvents contain high concentration of VOC. These organic compounds evaporate during the production process or contribute to the photochemical reaction. VOCs and HAPs, together with sunlight and nitrogen oxides, cause photochemical smoke, air particles and ground level ozone emission in the atmosphere. The VOCs and heavy metals can lead to soil and even water pollution when left in landfill. The amount of solvent retained by flexo, gravure and screen-printed products is 3-4% of total ink solvent used. The solvent in the printed ink content, except for the one held by the printed material evaporates in its own environment after the printing process. Most of these solvents and organic compounds used in printing environment contain at least one carbon and hydrogen atom and have negative effects on health and environment.In this study, the environmental impacts and risks of inks and solvents used in the printing industry have been evaluated. Measures to be taken to reduce and manage these environmental effects and risks have been addressed and recommendations have been made.

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THE PHENOMENON OF INK DUSTING TAKING INTO ACCOUNT THE SURFACE ROUGHNESS OFFSET PRINTING PLATE

Labour protection problems in Ukraine ◽

10.36804/nndipbop.37-2.2021.16-24 ◽

2021 ◽

Vol 37 (2) ◽

pp. 16-24

Author(s):

I. Khalilov ◽

E. Aliyev ◽

E. Huseynzade

Keyword(s):

Surface Roughness ◽

Contact Zone ◽

Friction Pair ◽

Gear Ratio ◽

Total Force ◽

Offset Printing ◽

Printing Plate ◽

Friction Forces ◽

Printing Process ◽

Roughness Model

The paper investigates the influence of the mechanics of a friction printing pair on ink dusting in the printing process, taking into account the surface roughness of the printing plate. The aim of the study is to determine the influence of the surface roughness of the printing plate on the deformation of the deckle, as well as on the value of the total force in the area of the printed contact, the relative gear ratio and the relative speed of sliding of the deckle along the surface of the cylinder, which directly affects the dusting of the ink. It was found that when studying the mechanics of a printed pair, the influence of the microgeometry of the contacting surfaces on the parameters under study was not taken into account. The influence of microprotrusions of the surface roughness of the printing plate on the deformation of the deckle in the area of the printed contact has been substantiated and established. To determine the introduction of surface roughness irregularities, a discrete roughness model is used, presented as a set of identical spherical segments. To determine the influence of the surface roughness of the printing plate on the friction force arising in the contact zone, a calculation scheme is proposed that differs from analogs. A method is developed for calculating the parameters of a friction pair in the printing process, taking into account the roughness. Expressions are obtained for determining the total moment of tangential friction forces in the sliding sections when spherical irregularities are introduced. According to the proposed technique, the corresponding graphical dependences of the gear ratio on different parameters of the friction printed pair are shown. The advantages of this study in comparison with analogs are that at certain values of the parameters of the friction pair, taking into account the surface roughness of the printing plate, also at known values of the mechanical characteristics and thickness of the deckle, it is possible to determine the change in the length of the deckle of a given composition, which is necessary in the printing process. The proposed calculation method, which is carried out without taking into account the pressure in the printed contact zone, allows predicting the quality of printed impressions and the amount of ink involved in the formation of ink dusting, as well as correctly adjusting the printing press before the printing process.

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A Study on the Assessment of Quality of Printed Sheets in Offset Sheet-Fed Printing

JST: Engineering and Technology for Sustainable Development ◽

10.51316/jst.148.etsd.2021.31.1.9 ◽

2021 ◽

Vol 31 (1) ◽

pp. 41-45

Keyword(s):

Quality Management ◽

Total Quality Management ◽

Quality Parameters ◽

Low Density ◽

Total Quality ◽

Offset Printing ◽

Pareto Chart ◽

Printing Process ◽

Ishikawa Diagram

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.

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