• Title/Summary/Keyword: print technology

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A Study of the Printability Coefficients on the Newspaper (I) - A Study on the printed density and print through in the maximum transfer point - (신문용지의 인쇄적성 예수에 관한 연구 (제1보) - 최대전이점에서 인쇄 색농도 및 뒤비침 -)

  • Ha Young-Baeck;Kim Chang-Keun;Oh Sung-Sang;Youn Jong-Tae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.38 no.1 s.113
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    • pp.27-33
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    • 2006
  • Newsprint is quantitatively the most important printing paper. The demands for its printability are continuously increasing. It is well known that the relationship between the physically tested paper properties and newspaper printability is unsatisfactory. In order to improve the printing quality of Korean newsprint, the printability coefficients such as maximum ink requirement(Ymax), print through were investigated. Kinds of newspapers and black printing ink were tested by IGT printability tester. Experiment condition of IGT printability tester was 14 steps between $0.2{\sim}2.8g/m^2$ of ink requirement, printing pressure was 200 N and printing velocity was 1 m/sec. The properties of newspaper samples (basis weight, bulk density, roughness, smoothness, porosity, i. e.) were examined in accordance with KS and TAPPI standard testing methods. The result of this study are respected for usefulness printing quality management of Korean newsprint.

The Study about Parody Effect on Print Ad. (인쇄매체광고의 패러디효과에 관한 연구)

  • 김규철;조경섭
    • Archives of design research
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    • v.15 no.4
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    • pp.231-242
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    • 2002
  • Due to the various reasons reducing the advertising effects in such as message reliability declining, target segmentation, and information technology, creative becomes more important than ever before. And this is more true in print advertising than electronic ones. The purpose of this study is to support to develop more effective advertisement in print advertising. Parody advertising, a postmodernic technique, effectiveness was tested empirically. Top-of-mind awareness, reliability toward advertising, attitude toward advertising, attitude toward brand, and purchase intention were adapted as a scale to measure the effectiveness of parody and non-parody advertising. Result proved the parody advertising shows higher effects than non-parody one. Conclusively saying that parody could be one of the possible ways to increase effects on print advertising to survive from the heavy competition and low attention.

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Patent Trend Report for Display using Roll-print manufacturing method(KR, JP) (롤프린트(Roll-print) 방식을 이용한 디스플레이의 특허동향(한국, 일본))

  • Jeong, In-Seong;Park, Ji-Hoon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2007.11a
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    • pp.35-35
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    • 2007
  • The roll printing technique is the updated technology which will substitute a existing lithography technique for a field of the display such as LCD, PDP, OLED and FED etc. Currently, the patent trend analysis about research and development of the different enterprises are demanded, because it is forecast that the dominion of display market will be exchanged by research and development result of roll-printing technique. In this presentation, it is analyzed on patent trends applied the roll printing technique for a field of the display such as LCD, PDP, OLED and FED etc in Korea and Japan by the various methods.

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Analysis of Aroma Pattern for Geographical Origin of Red Ginseng Concentrated by Electronic Nose (전자코를 이용한 홍삼 농축액의 원산지 판별을 위한 향기패턴 분석)

  • Hur, Sang-Sun
    • Journal of the Korean Applied Science and Technology
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    • v.37 no.1
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    • pp.38-48
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    • 2020
  • The aroma pattern was analyzed using electronic nose to examine the possibility of origin discrimination according to the mixing ratio of Chinese and Korean red ginseng concentrates. The origin of Chinese red ginseng concentrate and Korea red ginseng concentrate could be distinguished and the pattern of aroma component detected decreased as the mixing ratio of Chinese red ginseng concentrate increased. Cultivar and habitat of Korean red ginseng concentrated was remarkably distinguished by the chromatogram of frequency pattern, derivative pattern and visual pattern using olfactory images known as vapor printTM.

The Production of Alcohol from Municipal Waste(I) -The Changes of Components of the Pretreated Lignocellulosic Biomass- (도시 폐기물로부터 알콜생산(I) - 전처리된 lignocellulosic biomass의 조성분 변화 -)

  • Lim, Bu-Kug;Yang, Jae-Kyung;Jang, Jun-Pok;Lee, Jong-Yoon
    • Journal of the Korean Wood Science and Technology
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    • v.22 no.4
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    • pp.7-12
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    • 1994
  • In recent years, the municipal wastes recognized resources. This study was performed to survey the changes of main components of the pretreated(chemical, physical) lignocellulosic biomass. The result can be summerized as follows; In pulp fiber composition, newsprint and corrugating container were mainly consist of softwood fiber(tracheid). But computer print out and magazine had a large amount of hardwood fiber(wood fiber). And, carbohydrate content in the various lignocellulosic biomass increases as the following orders : Magazine < Newsprint < Corrugating container < Computer print out. In the chemical pretreatments for the delignification, sodium hypochlorite pretreatment was more effective than sodium hydroxide. By washing, ash content of lignocellulosic biomass was decreased. Physical pretreatments were less effective than chemical pretreatment for the delignification. On the other hand, in physical pretreatments, ash content of lignocellulosic biomass was the same tendency as in the chemical pretreatments.

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Droplet Ejection and Experimental Study on the Application of Industrial Inkjet Printhead (산업용 잉크젯 프린트헤드 액적 토출현상의 실험적 해석)

  • Park, Sung-Jun
    • Journal of Institute of Convergence Technology
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    • v.1 no.1
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    • pp.34-40
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    • 2011
  • In this paper, a hybrid design tool combining one-dimensional(1D) lumped model and three-dimensional computational fluid dynamics(CFD) approach has been developed in order to evaluate the performance of inkjet print head and droplet control process are studied to reduce the deviations between nozzles which affect the size of the printed line for the industrial application of direct writing on printed circuit boards(PCB). 1D lumped model analysis shows that it is useful tool for evaluating performance of an inkjet head by varying the design parameters. The differences in ejected volume and droplet velocity between analytical and experimental result are within 12%. Time sequence of droplet generation is verified by the comparison between 3D analysis result and photographic images acquired by stroboscopic technique. In addition, by applying DPN process, velocity and volume uniformity between nozzles is dramatically improved that the tolerance achieved by the piezoelectric inkjet printhead across the 64 nozzles is 5 to 8%. A printed line pattern is successfully obtained using the fabricated inkjet print head and droplet calibration system.

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The Effects of Ink Emulsion on Printed Mottle (잉크 유화가 인쇄 모틀에 미치는 영향)

  • Ha, Young-Baeck;Lee, Yong-Kyu;Kim, Chang-Keun;Oh, Sung-Sang;Lim, Jong-Hag;Youn, Jong-Tae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.39 no.2 s.120
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    • pp.31-37
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    • 2007
  • Lithography like off-set printing is processed using the repellent properties between water and oil, so all inks for off-printing must work with dampening solution(water). The dampening water may cause the emulsification of ink by the printing pressure in the printing nip. This study aimed to investigate the effect of emulsified inks on print mottle. The cyan ink was emulsified artificially with the different IPA(isopropyl alcohol) content in this study. We evaluated the print mottle by densitometer and image analysis method. The print mottle phenomenon was directly affected by IPA content. The emulsification of inks also had an influence on flow properties of inks and it increased ink transfer rate. It, however, caused low ink density. Moreover the emulsified inks were spreaded to around dots and cause the thinning density on the non-printing area like print mottle. The trial printing showed that the emulsified inks also cause scumming on the printing result with little mistake of adjusting dampening solution and mostly decreasing dot reproduction. We could, therefore, find out the obvious effect of emulsified inks on print mottle.

A Study on the Smart Printing Work Distribution Program to Increase the Efficiency of Managing Multiple Printers (복수의 프린터 관리효율을 증가시키기 위한 스마트한 인쇄작업 분배 프로그램 구현에 관한 연구)

  • Oh, Eun-Yeol
    • Journal of Convergence for Information Technology
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    • v.9 no.10
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    • pp.1-8
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    • 2019
  • Generally, printers are common for users to use for public use over a wired or wireless local area network. The number of printers in the same network is increasing, and management of multiple printers is needed. To do this, a program that drives two or more printers and a computer connected by a wired or wireless network. When a computer's control department receives a print command for a designated file, it executes the steps of receiving status information from the printer, selecting the printer, and sending the print command execution. As a method of research, we presented a method for selecting differentiation from this study through prior art research and literature research. Therefore, the purpose of the study is to distribute smart print commands according to real-time status information of many printers to increase the efficiency of the printer's management, and to distribute print commands according to the cumulative and usable workload of many printers so that parts replacement of many printers can be instantaneously performed.

Fatigue Test of MEMS Device: a Monolithic Inkjet Print

  • Park, Jun-Hyub;Oh, Yong-Soo
    • Journal of Mechanical Science and Technology
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    • v.18 no.5
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    • pp.798-807
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    • 2004
  • A testing system was developed to improve the reliability of printhead and several printheads were tested. We developed a thermally driven monolithic inkjet printhead comprising dome-shaped ink chambers, thin film nozzle guides, and omega-shaped heaters integrated on the top surface of each chamber. To perform a fatigue test of an inkjet printhead, the testing system automatically detects a heating failure using a Wheatstone bridge circuit. Various models were designed and tested to develop a more reliable printhead. Two design parameters of the width of reinforcing layer and heater were investigated in the test. Specially., the reinforcing layer was introduced to improve the fatigue life of printhead. The life-span of heater with a reinforcing layer was longer than that without a reinforcing layer. The wider the heater was, the longer the life of printhead was.

Phase Matching of Pressure Wave in a Drop-On-Demand Inkjet Print Head (요구 적출형 잉크젯 프린트 헤드에서의 압력파 위상 정합)

  • Kim, Myong-Ki;Hwang, Jun-Young;Lee, Sang-Ho;Kang, Kyung-Tae;Kang, Heui-Seok
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.9
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    • pp.116-125
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    • 2008
  • Inkjet printing technology with a drop-on-demand (DOD) inkget head technology has been recognized as one of versatile and low cost manufacturing tools in the electronics industry. Concerned with control of driving signal, however, general strategy to optimize jetting stability has not been understood well, because of the inherent complex multi-physics nature in inkjet phenomena. Motivated by this, present study investigates the effect of driving waveforms of piezoelectric head on jetting characteristics of DOD inkjet system focused on jetting stability with phase matching of pressure waves in the print head. The results show that velocities and volumes of the ink jetted droplets were linear relations with the driving signal's maximum voltage, while periodic behaviors are observed with the driving signal's pulse widths.