• Title, Summary, Keyword: ink

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The Thickness Change of the Phosphor Ink Layer and the Dielectric Ink Layer of a Inorganic Powder EL Lamp That was produced by Screen Printing Technique (스크린 인쇄 기법에 의해 제작된 분산형 무기 EL 램프의 형광층 및 유전층의 두께 변화)

  • Moon, Kil-Hwan;Kang, Young-Reep
    • Journal of the Korean Printing Society
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    • v.29 no.2
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    • pp.83-92
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    • 2011
  • A inorganic powder EL lamp was made by screen printing technique with phosphor ink and dielectric ink. The thickness change of a phosphor ink layer and a dielectric ink layer were not influenced on dielectric content, but rely on phosphor size and vehicle. Once finishing screen printing technique with phosphor ink and dielectric ink, and its surface has been printed again before not drying of phosphor ink and dielectric ink. Then phosphor ink and dielectric ink were not transferred. The electric capacity of inorganic powder EL lamp was more influenced on dielectric content than the thickness of dielectric ink layer, and it was more dependent on the thickness of phosphor ink layer than the thickness of dielectric ink layer.

Characterization and Comparison of Oriental Ink Sticks (동양 전통 먹(墨)의 이화학적 성상 비교 분석)

  • Kim, Kang-Jae;Eom, Tae-Jin
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.40 no.4
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    • pp.74-81
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    • 2008
  • The writing brush, ink stick, paper, and ink stone were the four precious things of the studying and recording in oriental world until even nowaday. The oriental paper was comparatively well evaluated in many papers and reviews, but it is difficult to find some scientific reports or reviews about the ink stick. In this paper, the scientific aspect of ink sticks of oriental maine three country(Korea, China, Japan) were evaluated by the physical, chemical and microscopic analysis. The result could summarized as fellows; 1. The Korean lampblack ink stick contains more carbon and less nitrogen and the Chinese ink sticks contain less carbon and more oxygen. 2. The Korean lampblack and cowhide glue contain relatively higher amount of sulphur. 3. The particle size distribution of carbon in the ink stick was not change after grinding in the ink stone. 4. The particle size of carbon and the pore size in the charcoal ink sticks of three country were larger than those of the lampblack ink sticks. 5. The ink solution of the charcoal ink sticks shows high roundness on Hanji while the ink solution of the lampblack ink sticks is spread readily to Hanji surface. 6. The change of whiteness in printing of the ink sticks is notable in thermal treatment.

Synthesis and Printability of Aqueous Ceramic Ink with Graft Polymer (Graft Polymer를 이용한 수계 세라믹 잉크의 합성 및 프린팅 특성평가)

  • Lee, Ji-Hyeon;Hwang, Hae-Jin;Kim, Jin-Ho;Hwang, Kwang-Taek;Han, Kyu-Sung
    • Korean Journal of Materials Research
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    • v.29 no.10
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    • pp.639-646
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    • 2019
  • Ink-jet printing is a manufacturing process technology that directly prints a digitalized design pattern onto a substrate using a fine ink jetting system. In this study, environmentally friendly yellow aqueous ceramic ink is synthesized by mixture of distilled water, yellow ceramic pigment and additives for ink-jet printing. The graft polymer, which combines electrostatic repulsion and steric hindrance mechanism, is used as a surfactant for dispersion stability of aqueous ceramic ink. Synthesized ceramic ink with graft polymer surfactant shows better dispersion stability than did ceramic ink with PAA surfactant; synthesized ink also shows desirable ink-jet printability with the formation of a single ink droplet during printability test. Finally, ceramic ink printed on glass substrate and ceramic ink with graft polymer surfactant shows a high contact angle without surface treatment on glass substrate. Consequently, it is confirmed that the ceramic ink with graft polymer surfactant can achieve high printing resolution without additional surface treatment process.

A Study on the Ink Transfer Using the Roughness and Substrate Energy of Substrate in Roll to Roll Printing Systems (롤투롤 인쇄 시스템에서의 기판 소재의 거칠기와 표면에너지를 이용한 잉크 전이에 대한 연구)

  • Shin, Kee-Hyun;Kim, Ho-Joon
    • Journal of the Semiconductor & Display Technology
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    • v.9 no.2
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    • pp.103-109
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    • 2010
  • An ink transfer is modeled and experimentally verified using roll-to-roll electric direct gravure printing process. The ink transfer model based on the physical mechanism for the maximum ink transfer rate is proposed, and experimented by the electric printing machine in FDRC for the relations of the maximum ink transfer rates to the printing pressure, the operating speed, the operating tension, the surface roughness of substrates, and the contact angle between substrate and silver ink. The free ink split coefficient and immobilized ink under the maximum ink transfer rate are calculated by the physical parameter in a printing process and contact angle between substrates and ink. Numerical simulations and experimental studies were carried out to verify performances of the proposed ink transfer model. Results showed that the proposed ink transfer model was effective for the prediction of the amount of transferred ink to the substrate in a direct gravure printing systems.

Studies on the Absorption Behavior of Dye and Pigment Ink for Ink-Jet Printing (잉크제트용 염료잉크와 안료잉크의 흡수거동에 관한 연구)

  • Lee, Hee-Myung;Lee, Yong-Kyu
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.37 no.2
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    • pp.47-56
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    • 2005
  • In technology of ink-jet coating, Image quality from correlation between paper and ink depends on the properties of printer and ink as well as those of paper material. Generally, According to the quality of ink that consists of colorants from 5 to 20 percent, It seems that absorption behavior of each ink is different. In this study, we studied to estimate the effects of dye and pigment ink on the absorption and printing properties using 2-type papers on the market and 3-type silica-based coated papers whose pore structure is different. Using the theory of contact angle to evaluate the absorption property, it was possible to measure the baseline length between paper and ink, volume of droplet as well as contact angle. Also, It was possible to calculate wetting energy(mN/m) and spreading coefficient(mN/m) using the surface tension of each ink. These measurements were available to estimate ink-jet qualities.

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

  • Park, Jae-Hyeon;Lee, Ji-Hyeon;Kim, Deug Joong;Hwang, Kwang-Taek;Kim, Jin-Ho;Han, Kyu-Sung
    • Journal of the Korean Ceramic Society
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    • v.56 no.5
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    • pp.461-467
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    • 2019
  • Ink-jet printing technology, which utilizes a digitalized design to print fine ink directly on a substrate, has been of interest in various industries due to its high efficiency and adaptability to various materials. Recently, active attempts have been made to apply ceramic materials having excellent heat resistance, light resistance, and chemical resistance to the ink-jet printing process. In this study, ceramic ink was synthesized by combining ceramic pigments with UV curable polymer. 3D printability at various contact angles between ceramic ink and substrate was analyzed in detail. Rheological properties of the synthesized ceramic ink were optimized to meet the requirements of the ink-jet printing process, and the contact angle of UV curable ceramic ink was controlled through surface treatment of the substrate. The potential for additive manufacturing of ceramic material using ink-jet printing was investigated by analyzing the effect of contact angle control on ceramic ink droplets and their 3D printability.

A study the ink transition of polycarbonate by using of screen printing technioque (Screen 인쇄기법을 이용한 Polycarbonate의 Ink 전이성에 관한 연구)

  • 신종순;강영립;최명철
    • Journal of the Korean Printing Society
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    • v.19 no.2
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    • pp.49-57
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    • 2001
  • This thesis attempts to study ink transition for on the polycarbonate multicalculator plate for automobile. For this study, the change of weight by screen printed ink transition on polycarbonate material by ink viscosity(be diluted ; 0%, 5%, 10%, 20%) was observed. The weight by screen printed ink is depended on amount of added solvent. We have studied change of the weight by the transition of the ink that was screen-printed on polycarbonate which is to be printed according to the viscosity of the ink (diluent: undiluted solution 5%, 10%, 15%, 20%). This shows that ink transition become activated since the amount of ink(or/and the viscosity of ink) is increased.

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A Study on Photolysis of Aromatic Diazonium Salt (방향족 디아조늄염의 광분해에 관한 연구)

  • 이형관
    • Journal of the Korean Printing Society
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    • v.12 no.1
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    • pp.93-105
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    • 1994
  • A new ink transfer model based on the physical mechanism for the maximum ink transfer rate is proposed, and examined by the experimental data of P.J Mangin et, al. for the relations of the maximum ink transfer rates to the printing pressure, the speed and the roughness of paper substrates. The free ink split coefficient and immobilized ink under the maximum ink transfer rate are calculated by the new model and the experimental data. It is concluded that the new model is very useful, and the free ink split coefficient and the immobilized ink are inversely propotional and propotional to the paper roughness respectively and both are saturated eventually under the critical values.

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Optimization of Aqueous Nano Ceramic Ink and Printing Characterization for Digital Ink-Jet Printing

  • Kwon, Jong-Woo;Sim, Hee-Seok;Lee, Jong-Heun;Hwang, Kwang-Taek;Han, Kyu-Sung;Kim, Jin-Ho;Kim, Ung-Soo
    • Journal of the Korean Ceramic Society
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    • v.54 no.6
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    • pp.478-483
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    • 2017
  • The advantage of ceramic ink-jet printing technology is the accurate and fast printing process of digital images for various products. For digital ink-jet printing applications, ceramic ink requires proper viscosity and surface tension, along with dispersion stability of the inorganic pigments. The purpose of this study is the formulation of an environment-friendly ceramic ink with a water-based system; using nano-sized $CoAl_2O_4$ pigment as a raw material, ink should have dispersion stability to prevent nozzle clogging during ink-jet printing process. In addition, the surface tension of the ceramic ink was optimized with the polysiloxane surfactant according to the surface tension requirement (20 - 45 mN/m) for ceramic ink-jet printing; by adjusting the viscosity with poly ethylene oxide, jetting behavior of the ceramic ink was investigated according to changes in the physical features through drop watcher measurement.

Influence of the Variation of the Coating Color Composition and Characteristics of Inks on the Printability of the Coated Paper (도공액 조성변화와 잉크 물성변화가 인쇄품질에 미치는 영향)

  • Koo, Chul-Whoi;Ha, Young Baeck
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.46 no.5
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    • pp.1-8
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    • 2014
  • In this study, the influence of the physical properties of ink such as ink dispersity and emulsified amount on the printability of a coated paper was investigated with seven kinds of cyan inks. In addition, two kinds of coating formulations were tested to evaluate the effect of coating structure on the coated paper printability. It was found that the cyan ink with $2{\mu}m$ pigment size had the best dispersibility and hence the ink showed a best ink density on the two kinds of coated papers. When the emulsified ink A with IPA 20 wt% had a lower viscosity than emulsified ink B with IPA 10 wt%, the emulsified ink A showed relatively high value of the ink transfer rate in comparison with emulsified ink B. Despite the high value of ink transfer rate, the coated paper did not show a good printability because those inks with low viscosity due to a strong emulsification were easy to make print mottle on the coated paper.