• 제목/요약/키워드: ink absorption

검색결과 43건 처리시간 0.026초

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

  • 이희명;이용규
    • 펄프종이기술
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    • 제37권2호
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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.

인쇄 모틀의 방지를 위한 제지도공 기술개발 (제3보)-도공량 변이에 따른 잉크 흡수성 평가 및 인쇄 모틀 예측 - (Development of Paper Coating Technologies to Prevent Print Mottle (III)-Evaluation of Ink Absorption Properties of Coated Papers and Prediction of Print Mottle-)

  • 이학래;신동소;전준경
    • 펄프종이기술
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    • 제29권3호
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    • pp.60-68
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    • 1997
  • To develop paper coating technology for preventing print mottling, which is recognized as the most common printing problems in using coated papers, ink absorption properties of various coated papers were examined by employing K 8T N and Croda ink absorption tests. The influences of pigment compositions, coat weights and drying methods on these ink absorption properties were examined, and then the variations of ink absorption ratio were analyzed and discussed. It is demonstrated that the variation of Croda ink absorption ratio induced by coat weight variation can be utilized most succesfully to predict print mottling propensity of coating formulations. A systematic analysis approach was suggested that can be employed in the development of the most desirable coating color formulation to achieve target optical properties with the least print mottling.

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바인더용 고분자 첨가제에 따른 잉크젯 인화지의 잉크흡수 특성변화 (Change of Ink Absorption Characteristics of Ink-Jet Printing Paper with Polymeric Binder)

  • 김철용;이명천
    • 폴리머
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    • 제30권6호
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    • pp.550-555
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    • 2006
  • 잉크젯프린터용 잉크가 수성화되어 감에 따라 전용 인화지에 사용되는 코팅제 역시 수성 코팅제가 사용되고 있는 추세이다. 이 수성 코팅제에 사용되는 재료를 살펴보면 안료로는 알루미나솔, 주 바인더로 폴리 (비닐 알콜), 부족한 물성을 향상시키기 위해 고분자 첨가제를 사용한다. 된 연구에서 사용된 고분자 첨가제는 스티렌과 부틸아크릴레이트를 기본으로 하구 메타크릴산, 아크릴산, 아크릴 아미드 단량체들을 조합하여 에멀션 중합법으로 합성하였다. 중합시 비이온 및 음이온 유화제를 혼합 혹은 단독으로 사용하고, 단량체 조합과 고분자 첨가제의 입자구조를 변화시켜 흡수성, 퍼짐성, 광학밀도의 인쇄적성과 광택도 내수성 등의 변화를 살펴보았다. 이 결과, 음이온 유화제나 카복실기를 가지는 아크릴산 같이 음이온성이 큰 물질을 사용한 경우 알루미나 솔과의 상용성에서 문제를 야기하였고 아크릴 아미드는 인쇄적성에서 뛰어난 결과를 얻었지만 광택도가 떨어지는 경향을 알 수 있었다. 메타크릴산이 함유된 경우 광택도는 향상되었지만 인쇄적성이 떨어졌다.

도공지 물성과 잉크분산성에 따른 인쇄 모틀 연구(제1보) - 인쇄적성 시험에 의한 해석 - (The Study of Printed Mottle on Properties of Coated Paper and Ink Dispersion (I) - Analysis of printability test -)

  • 하영백;이용규;김창근;오성상;임종학;윤종태
    • 펄프종이기술
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    • 제38권4호
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    • pp.47-52
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    • 2006
  • This study is about the effect from properties of coated paper and ink dispersion to the printed mottle. Ink receptivity would be expected that it is mainly effected by roughness of coated paper Because the transfer of ink can not be uniform with rough surface, it will cause the optical appearance such like printed mottle. And also it may be able to cause the printed mottle from uneven transfer of ink due to absorption property of based paper, depend on size degree, by using dampening in Off-set printing. Each different specific of surface and ink dispersion could cause printed mottle. Therefore this study was carried out by using densitometer and image analysis to show the interaction between properties of domestic coated paper and ink dispersion.

도공지 물성과 잉크 분산성에 따른 인쇄 모틀 연구(제2보) - 실 인쇄 테스트에 의한 해석 - (The Study of Print Mottle related to the Properties of Coated Paper and Ink Dispersion(II) - Analysis of trial printing -)

  • 하영백;이용규;김창근;오성상;임종학;윤종태
    • 펄프종이기술
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    • 제39권1호
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    • pp.25-29
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    • 2007
  • Print mottle is the spotty and cloudy appearance of the ink on the substrate. Print mottle is influenced significantly by the characteristics of the paper with regard to homogeneity of its structure and its coating. The print mottle can be counteracted, in particular by altering the absorption characteristics of the inks, by changing sequence in which the inks are printed, or by using a advanced coated paper. In this study, we investigated the effect of ink dispersion to the print mottle through trial printing test and also analyzed the correlation between properties of coated paper and subjective results by statistic method. The result of this study is expected to be applied the basic data to solve the problem of printing mottle.

도공층 조성 및 구조의 잉크흡수성에 대한 영향 (The influences of coating components and structures on ink absorbency)

  • 곽상효;김진현
    • 한국펄프종이공학회:학술대회논문집
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    • 한국펄프종이공학회 1999년도 춘계학술발표논문집
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    • pp.7-16
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    • 1999
  • The aim of this research was to evaluate the influences of coating components and structures on ink absorbency. The ink absorbency was measured as porosity, K&N ink absorption, gloss and ink set-off. In order to obtain the relationship between the coating structure and the ink absorbency, the binder level was adjusted and two types of pigments were examined. One of the pigments was known to make the porous coating structure and the other one had strong ink affinity. The effects of coating components were studied by applying six different types of latex and various additives . In this research, CLC(cylindrical laboratory coater) and Prufbau printability tester were used. It was found that the decreasing latex dosage and introducing porous pigment were effective solutions to increase ink absorbency. However, the ink absorbency could not be improved by applying the fine pigment even though it had strong ink affinity. Among the characters of the latex, particle size and surface tension were found to have the strong effect on ink absorbency. The ink absorbency increased with large particle size and low surface tension latex. The additives were varied and it was found that applying to the top coating was effective.

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윤전 오프셋인쇄에서 인쇄뒤비침에 영향하는 인쇄조건에 관한 연구 (Effect of Printing Conditions on Print-Through in Web Offset Printing)

  • 전성재;홍기안;윤종태
    • 한국인쇄학회지
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    • 제26권1호
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    • pp.29-38
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    • 2008
  • Print-through is one of the most important attributes of print quality and has long been a subject to study. However, some aspects of print through are still in need to be enlighten. In this paper, different kinds of evaluating methods for print through are compared using densitometry, brightness, and image analysis. Printing conditions including ink feed, drying condition, and emulsification rate are systematically changed to effect print-through both on uncoated and coated commercial papers. Also several inks from different makers are introduced and compared in terms of print-through propensity. From the results, densitometry is not a good indicator for print through on the papers in this study. Ink feed has a strong effect on print through, especially for uncoated paper and should be considered in a point of optimum ink feed level in real world. Contribution of faster ink(oil) absorption seems to be more competitive than that of ink(oil) evaporation resulting in severer print-through for hot drying process. It is shown that ink-water emulsification rate increases print through at mild level but easy to decrease it with lower density due to the increase of water contents in emulsion. It is believed that the effect of absorption overwhelms that of density drop at mild emulsification level. This study does not include the effect of ink attributes in detail but shows that distinctive differences in print through may be resulted from various ink-makers and is finalized with some suggestions.

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안료의 혼합비율이 잉크제트 인쇄특성에 미치는 영향 (Influence of Mixing Ratio of Pigments on Ink-jet Printing Properties)

  • 이용규;안국헌;이광섭
    • 펄프종이기술
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    • 제34권1호
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    • pp.30-36
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    • 2002
  • The objective of this study was to investigate the viscosity of coating colors and ink-jet printing properties with different coating colors with various blending ratios of silica based pigments. The volume of pigments was measured to evaluate the effect of the pigments on the viscosity of coating colors. Contact angle, the change of ink diameter, optical density, and the area and perimeter of a printed let-ter were evaluated to examine the effect of the ink absorption on the ink-jet printing properties. Generally, as the amount of silica pigments Increased the ink-jet printing quality improved. But this caused an increase of the overall coating viscosity.

국산 신문 용지의 인쇄 압력에 따른 잉크 침투 깊이에 관한 연구 (A Study on the Depth of Ink Penetration according to the Printing Pressure in Domestic Newsprint Paper)

  • 유재현;백용국;윤종태
    • 한국인쇄학회지
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    • 제27권1호
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    • pp.59-71
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    • 2009
  • Measuring ink penetration is one of the best ways to know paper printability. Ink penetration was effected by physical properties of newsprint paper. This study was carried out for the purpose of improvement printability with ink penetration of domestic newsprint paper. The samples were prepared by means of 20 newsprint paper manufacture company in Korea, and were tested by IGT printability tester. The results of this experiments showed that the depth of ink penetration according to the printing pressure. The maximum points in ink transfer curve and the coefficients of oil absorption of the papers also depend mainly upon the situation of anchor points.

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백상지 혼합고지의 알칼리 탈묵과 탈묵제 젖음성의 영향 (Effect of Deinking Agent Wettability on the Alkaline Deinking of Mixed Office Wastepaper)

  • 윤병태;김영호;김철웅;서영범;전양
    • 펄프종이기술
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    • 제35권4호
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    • pp.34-41
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    • 2003
  • The effect of wettability of deinking agents which formed with various nonionic surfactants against the pulp fibers and ink particles were studied, And the effect of flotation processes on the deinking were also investigated. The wettabilities of the deinking agents against the water and ink particles were measured by Washburn tube and sessile drop techniques, respectively. As the water absorption increased (i.e., hydrophilicity increased), the ink removal increased, which indicates that the ink removal is strongly affected by the detachment process due to the swelling of the pulp. Also, when the contact angle of air/ink/deinking agent increased, the hydrophobicity of the ink particles increased, the efficiency of the ink removal and the brightness increased.