• 제목/요약/키워드: offset printing

검색결과 122건 처리시간 0.026초

국내 신문 인쇄의 색재현 특성에 대한 평가 (A Study on The Color Reproduction Properties of Domestic Newspaper Prints)

  • 박한아름;강상훈
    • 한국인쇄학회:학술대회논문집
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    • 한국인쇄학회 2007년도 추계 학술논문 발표회
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    • pp.29-43
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    • 2007
  • Web offset newspaper prints is the most widely used printing process in domestic printing industry, but there are no industry-wide specifications for press control to assure consistent quality across newspaper printing plants. As newspaper printing becomes more of a commodity and less of an art, it is necessary to develop the print quality specification standard suitable for Korea web offset newspaper printing field. There are a few commonly employed printing standards such as, SNAP(Specification for Non-Heatset Publication) of the US, IFRA(INCA-FIEJ Research Association), J-color (Japan printing machinery association). And there exists KS for domestic standards, however, since it has been directly imported from ISO standards, there are discrepancies in printing materials and media. This paper aims to examine the color reproduction quality of domestic web offset newspaper prints by comparing with foreign standards. Printing experiments on this study have been performed at one of the domestic newspaper printing companies. The color reproduction properties of the web offset newspaper prints are measured by means of densitometry and colorimetry. These measures are evaluated comapratively with the international standards by means of analyzing, the major factors that determine the color reproduction quality of web offset newspapar prints.

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Reverse Offset Printing용 고신축성 Blanket 재료 선정에 관한 연구 (A Study on the Selection of Highly Flexible Blanket for Reverse Offset Printing)

  • 신승항;김석;조영태
    • 한국기계가공학회지
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    • 제20권5호
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    • pp.121-127
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    • 2021
  • Reverse offset printing is considering as an emerging technology for printed electronics owing to its environmentally friendliness and cost-effectiveness. In reverse offset printing, selecting the materials for cliché and blanket is critical because of its minimum resolution, registration errors, aspect ratio of reliefs, pattern area, and reusability. Various materials such as silicon, quartz, glass, electroplated nickel plates, and imprinted polymers on rigid substrates can be used for the reverse offset printing of cliché. However, when new structures are designed for specific applications, new clichés need to re-fabricated each time employing multiple time-consuming and costly processes. Therefore, by modifying the blanket materials containing the printing ink, several new structures can be easily created using the same cliché. In this study, we investigated various elastomeric materials and evaluated their applicability for designing a highly stretchable blanket with controlled elastic deformation to implement tunable reverse offset printing.

리버스 그라비아 옵셋 또는 그라비아 옵셋 프린팅을 이용한 조명용 OLED 소자 보조전극 형성 공정 연구 (A Study on Processing of Auxiliary Electrodes for OLED Lighting Devices Using a Reverse Gravure-Offset or Gravure-Offset Printing)

  • 배성우;곽선우;김인영;노용영
    • 한국정밀공학회지
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    • 제30권6호
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    • pp.578-583
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    • 2013
  • The lighting devices using organic light emitting diodes (OLEDs) are actively researched because of the various advantages such as high power efficiency and 2-dimensitonal lighting emitting. To commercialize those OLED lighting devices, the manufacturing cost must be downed to comparable price with conventional light sources. Here, we demonstrate a reverse gravure-offset or gravure off-set printed metal electrode for the auxiliary electrode for OLED lighting devices. For the fabricated OLED's auxiliary electrode, we used Ag nano-paste and printed metal grid structure with a line width and spacing of several ten and hundred micrometer by using gravure-offset printing. In the end the printing metal grid pattern are successfully achieved by optimization of various experimental conditions such as printing pressure, printing speed and printing delay time.

국내 신문 인쇄의 색재현 특성에 관한 연구 (A Study on The Color Reproduction Properties of Domestic Newspaper Prints)

  • 박한아름;강상훈
    • 한국인쇄학회지
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    • 제25권1호
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    • pp.27-41
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    • 2007
  • Web offset newspaper prints is the most widely used printing process in domestic printing industry, but there are no industry-wide specifications for press control to assure consistent quality across newspaper printing plants. As newspaper printing becomes more of a commodity and less of an art, it is necessary to develop the print quality specification standard suitable for Korea web offset newspaper printing field. There are a few commonly employed printing standards such as, SNAP (Specification for Non-Heatset Publication) of the US, IFRA(INCA-FIEJ Research Association), J-color (Japan printing machinery association). And there exists KS for domestic standards, however, since it has been directly imported from ISO standards, there are discrepancies in printing materials and media. This paper aims to examine the color reproduction quality of domestic web offset newspaper prints by comparing with foreign standards. Printing experiments on this study have been performed at one of the domestic newspaper printing companies. The color reproduction properties of the web offset newspaper prints are measured by means of densitometry and colorimetry. These measures are evaluated comapratively with the international standards by means of analyzing, the major factors that determine the color reproduction quality of web offset newspaper prints.

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국산 Heat-set 윤전 잉크의 인쇄 적성에 관한 연구 (The Study of Printability on the Domestic Heat-set Web Inks)

  • 하영백;최재혁;김형진;이원재;오성상
    • 한국인쇄학회지
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    • 제28권2호
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    • pp.101-116
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    • 2010
  • Last printing market is changing to high-quality color prints for web offset printing. But, color image reproduction based on the relative sheet-ped printing compared to the way, web offset printing are falling. Moreover, it's difficult to maintain the quality of the web offset print. The reason is the worker's decision to rely on. Therefore, the quality of prints was no difference in uniformity and objectivity. We have thought the reason, that the physical properties of inks such as fluidity, viscosity and tack. In addition, varies depending on the physical properties of paper, such as thickness, smoothness, roughness and porosity. Therefore, we studied the properties of ink and paper on the relations between the properties used IGT printability tester. This study of domestic web offset printing inks and papers on the relationship between physical properties and printability were studied. So, to improve printability will be used as the basis resources for web offset printing.

Reverse Offset에서 잉크 전이 유동에 관한 시뮬레이션 연구 (A Study on the Computer Simulation of Ink Flow in the Reverse Offset Printing)

  • 이언석;윤종태
    • 한국인쇄학회지
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    • 제30권2호
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    • pp.23-33
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    • 2012
  • With the development of many display technologies currently applied to them in the field of printed electronics, there have been many researches that high resolution printing for thin and uniform pattern. In this paper, printing ink flow properties in the reverse offset mechanism were simulated. The aim of this research is to expect the ink flow behavior between cliches to make fine pattern by a printing technique which is a reverse offset. The simulation results show that almost the same as the experiments and the flow behavior according to the ink film thickness and printing pressure changes could be expected.

인쇄전자를 위한 롤투롤 그라비아 옵셋 인쇄 장비 (Roll-to-Roll Gravure Offset Printing System for Printed Electronics)

  • 김충환;최병오;류병순;임규진;이명훈;김동수
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.461-466
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    • 2007
  • There has been a great interest in printing technology as a low cost and mass production method for the application of printed electronics such as printed TFT, solar cell, RFID Tag, printed battery, and so on. In this study, apparatuses of gravure-offset printing are developed for fine line-width/gap printing and examining pattern distortion occurred in gravure-offset printing process. The fine line-width/gap pattern shows that it is possible to make around 20 micro-meter line-width/gap printing patterns. Pattern distortion is modeled, and the amount and shape of the distortion are calculated by using commercial FEM code. The roll-to-roll printing system under development consists of unwinder/rewinder, two printing units, one coating unit, drying units, guiding unit, vision system, and other auxiliary devices. For multi-layer printing, the system is designed to be capable of printing two different materials.

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고품질 색재현을 위한 오프셋인쇄 공정의 최적화에 관한 연구(II);제판과 인쇄공정을 중심으로 (The Optimization of Offset Printing Process for High Quality Color Reproduction(II);Platemaking and Presswork)

  • 김성수;강상훈
    • 한국인쇄학회:학술대회논문집
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    • 한국인쇄학회 2007년도 추계 학술논문 발표회
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    • pp.13-28
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    • 2007
  • Producing printing plate is essential progress to do offset printing. In this Film-less period, the more PS plate becomes extinct, the more the age of the Plate-Making of Exposure declines the place to stand. To do offset printing, the CTP (Computer to Plate) is taking a place of PS plate that covers speed, quality and economical problems. The biggest advantage of using CTP is that laser directly goes to the plate, thus there are no dust from the Plate-Making of Exposure. It is also theoretically able to print 200lpi${\sim}$300lpi as well as print 1751pi, because it has over 2400dpi resolution. The high quality printing could be available inside of the country, if printing machine keeps the optimum condition in offset printing. The CTP has many advantages, however there is a difficulty for the operators to preserve the equipment. The actual circumstance is that they cannot make a decision about how many dots need to be generated, and also it is necessary to know how to establish the setup at RIP on CTP to make the optimum condition output. If offset printing machine keeps the optimum condition, it would be able to print up to high quality printing however it is hard to comment what is the optimum condition for the printing machine. Anyone could say easy subjectively that machine is in the optimum condition, however it is objectively hard to estimate by number. In this research GATF / Plate Test target used to analyze the image and to make numerical value of the optimum condition of the CTP. It also used GATF / The sheep fed test printing 5.0 to know the density of the color representation, dot gain and gray balance for the optimum condition of the print machine. The purpose of this research is to represent the ISO 12647-2 which is the international standard with domestic printing equipments.

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그리비어 옵셋을 이용한 메탈 그리드 메쉬 필름 제작 기법 (Fabrication Method of Metal Grid Mesh Film Using the Gravure Offset Printing)

  • 김정수;김동수
    • 한국정밀공학회지
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    • 제31권11호
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    • pp.969-974
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    • 2014
  • Previously fabricated electronic devices were used for vacuum manufacturing processes such as conventional semiconductor manufacturing. However, they are difficult to apply to continuous processes such as roll-to-roll printing, which results in very high device manufacturing and processing costs. Therefore, many developers have been interested in applying continuous processes to contact printing or noncontact printing technologies and they proposed various continuous printing techniques instead of conventional batch coating. In this paper, we proposed improved gravure offset printing process as one of the contact printing technique. We used etching pattern geometry with soft core blanket roll for printing of ultra fine line below the 10um.Using this technique we obtained flexible metal grid mesh film as transparent conductive film.

인쇄전자를 위한 그라비아 옵셋 인쇄 (Gravure Offset Printing for Printed Electronics)

  • 김충환;최병오;류병순;김동수
    • 한국정밀공학회지
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    • 제25권5호
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    • pp.96-102
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    • 2008
  • Manufacturing of printed electronics using printing technology has begun to get into the hot issue in many ways due to the low cost effectiveness to existing semi-conductor process. This technology, with low cost and high productivity, can make it possible to produce printed electronics such as TFT, solar cell, RFID Tag, printed battery, and so on. In this study, apparatus of gravure-offset printing are developed for fine line-width/gap printing and the results obtained from the apparatus shows that it is possible to make around 20 micro-meter line-width/gap printing patterns. The roll-to-roll printing system for fine line-width printing based on primary experiment is presented. The printing results obtained from the system shows around 30 micro-meter line-width/gap printing patterns.