• Title, Summary, Keyword: 광택도

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Parametric Study on Gloss Property of UV Curable Coated Steel (자외선 코팅 강판의 광택도에 미치는 공정 변수에 대한 연구)

  • Hwang, Dong Seop;Cho, Dong Chul;Yoo, Hye Jin;Kim, Jong Sang;Cheong, In Woo
    • Journal of Adhesion and Interface
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    • v.15 no.3
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    • pp.116-122
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    • 2014
  • This work deals with the effects of different oligomers, monomers, photoinitiators, and steel plates on the variation of gloss for UV coated steel plates at $20^{\circ}$ and $60^{\circ}$ (ASTM D523). The gloss value was more significantly varied with $20^{\circ}$ angle as compared with $60^{\circ}$. No substantial change in gloss was observed for the type of single oligomer; however, the gloss varied with the mixing ratios of oligomers, type and mixing ratio of monomers, type and concentration of photoinitiator, and type of steel plate. The maximum gloss value was observed when the mixing ratio of polyurethane acrylate (UA) to epoxy acrylate (EA) was 70 : 30, the mixing ratio of trimethylolpropantriacrylate (TMPTA) to tetrahydrofurfurylacrylate (THFA) was 5 : 5, the content of the mixed oligomer (UA : EA = 70 : 30) was 90 wt%, respectively. Darocur MBF of liquid type showed better gloss property than the solid type of Irgacure 184, and the gloss was decreased as the concentration of Darocur MBF increased from 1 to 4 wt%. Regarding the type of steel plate, GI steel plate showed better gloss property as compared with EG and primer-coated steel plates. The maximum gloss values of 95 GU and 120 GU, respectively, at $20^{\circ}$ and $60^{\circ}$ angles throughout the parametric study in the absence of leveling agents enhancing the gloss.

Optical property according to the fiber cross-sectional shape (섬유단면형상에 따른 직물의 광택특성)

  • 심현주;홍경아
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.171-172
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    • 2003
  • 직물의 외관 품위는 직물의 촉각뿐만 아니라 시각적인 자극에 의해서 크게 결정된다. 견직물이나 양모직물의 광택 등 자연스러운 광학적 특성은 특히 구성 섬유의 특성이나 구성사의 구조, 직물 조직 등과 밀접한 관계가 있는데 그 중 섬유단면형태가 가장 중요한 인자라고 할 수 있다. 따라서 단면형상에 따른 직물의 외관 감성 특히 시각특성에 미치는 영향을 알아보기 위하여 직물의 광택도를 측정하였다. 그 결과 섬유 단면의 요철이 많으면 광택도가 감소하면 섬유단면이 매끈한 부분이 많은 섬유는 광택도가 증가하였다. 그러나 이섬도 혼섬단면사로 구성된 직물은 광택이 우수하면서 은은함을 부여해주었다.

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The mold form coating material research for the exposure concrete surface control (노출콘크리트 표면처리를 위한 거푸집 코팅재료 연구)

  • Lee, Young-Do
    • Journal of the Korea Institute of Building Construction
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    • v.10 no.5
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    • pp.137-143
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    • 2010
  • This research is a comparative analysis of the surface gloss of concrete depending on the coating material added to the cast, and includes analyses of the surface gloss of specimens made of cement mortar, with and without the addition of superplasticizer. In terms of coating material, the 7th material, which is part of a liquid packaging material, was shown to have the highest gloss, and was followed by the 3rd material, which uses transparent film. As the level of gloss is shown to vary depending on the material used for the coating film, it can be interpreted that the surface gloss can differ depending on surface particles and chemical composition factors. To make a concrete surface smooth, it is more effective to use a coating material with impermeability and a highly dense surface.

조절된 코팅구조상에서 옵셋인쇄광택의 발현: Part 2

  • Jeon, Seong-Jae
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • pp.121-134
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    • 2003
  • 최근의 많은 연구로부터 인쇄광택에 대한 코팅구조의 영향이 보고되고, 거론되고 있다. 그러나, 다각적이고, 다양한 잉크량 범위에서 인쇄광택의 개별적 인자에 대한 독립적 영향은 보고된 바 없다. 본 고에서는 다양한 코팅재료와 이어진 캘린더링 공정을 조합하여 Full-factorial실험설계에 준한 모델시료를 제작하고, 특성화하였다. 더불어 공극이 없지만 넓은 범위의 거칠음 수준을 가진 필름을 포함하였다. 통계도구를 사용하여 각 인자의 독립적인 영향을 추출하므로써, 각 구조인자의 함수로서 인쇄광택의 정량적인 반응도를 얻을 수 있었다. 결과는 60도와 75도 광택으로 표현하였다. 잉크공급량의 증가는 코팅층 거칠음의 영향을 약화는 시키되 배제시킬 수는 없었다. Matte급의 코팅층에 대한 인쇄광택은 코팅거칠음이 가장 큰 영향인자로 나타났다. 이는, 잉크필름의 Leveling을 저해하는, 큰 잉크필름의 분열형태와 코팅면을 따라 흐르며 형성되는 잉크필름 때문으로 생각되었다. 공극구조의 영향은 전반적으로 높은 잉크량과 백지광택수준에서 가장 크게 나타났다. 전체적으로는 코팅거칠음이 인쇄광택에 가장 강한 인자였으며, 공극크기, 공극부피가 뒤를 이었다. 그러나, 광택지 영역에서는 공극크기가 가장 강한 영향인자로 구분되었으며, 거칠음, 공극부피가 뒤를 이었다. 이러한 결과는 인쇄품질 측면에서 코팅을 최적화하는데 활용될 수 있을 것이다.

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Mineralogical Studies on Luster of Seawater Cultured Pearls, Tongyeong, Korea (경남 통영 해수양식진주의 광택에 대한 광물학적 연구)

  • Cho, Hyen Goo;Kim, Soon-Oh;Do, Jin Young
    • Journal of the Mineralogical Society of Korea
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    • v.28 no.1
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    • pp.9-16
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    • 2015
  • A mineralogical analysis on the factors affecting the luster of pearls was carried out using gravity measurement, optical microscope observation, X-ray diffraction analysis, and scanning electron microscopy. We divided the seawater cultured pearls from Tongyeong into the following four types based on luster and shape; good luster and round (LR), lackluster and round (LLR), lackluster and baroque (LLB), and lackluster and two nucleus (LTN) pearls. Pearls with high-quality luster had slightly lower specific gravity as compared to pearls with low-quality luster, but both these types of pearls are within the specific gravity range of commercial pearls. Regarding the cross-sectional thickness of the mother-of-pearl layer, LR pearls showed a uniform thickness of about 0.3 mm in average. On the other hand, LLR pearls were characterized by relatively thinner, but uniform thickness. LTN and LLB pearls showed a tendency of significantly large variation in thickness even within a single pearl. For the surface of pearls, pearls with high-quality luster showed narrower and clearer growth lines of aragonite crystals as compared to pearls with low-quality luster. Pearls with high-quality luster were characterized by fewer aragonite crystal lattice defects as compared to pearls with low-quality luster, and the former showed parallel arrangement, thinner thickness, and less difference in thickness on the surface and inside. If a pearl has a prismatic layer, it is composed of aragonite with calcite in the prismatic and nacreous layer, and calcite content is very high in the lackluster pearl. Pearls without a prismatic layer were devoid of calcite irrespective of their quality of luster, and were composed of aragonite.

An Experimental Study of Metal Polishes Applied on Surface Cleaning of Silver Metal Archival Objects (은제 행정박물의 표면 클리닝에 적용되는 금속광택제 실험연구)

  • Cho, Ha Nui;Cho, Nam Chul
    • Journal of Conservation Science
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    • v.30 no.2
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    • pp.157-168
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    • 2014
  • This study, by selecting 3 kinds(Polish T, H, C) of metal polish being frequently used for silver archival objects treatment at present, a polish having excellent conservative property that minimizes damage of silver surface while effectively removing its yellow discolored layer by each using tool was intended to be discovered by comparing performance of tarnish inhibitor, corrosion inhibitor contained in each polish. As a result of analysis, it was confirmed that specimen that was cleaned with cotton swab and lint-free wipe by using Polish C provides not only uniformed surface expression and minimum damage but also removal function of corrosion layer. In addition, even though tarnish inhibition film should be formed after polish treatment, discolored phenomenon is unable to be prevented but among those polishes, Polish C was represented to be most stable against UV and yellowing and it showed relatively better features than that of Polish H and T in terms of hydrophobic, dispersive property. Through this, it is confirmed that Polish C would show the most excellent performance among polishes being used for conserving silver archival objects.

Physicochemical Characteristics of Soybean Seed Coat and Their Relationship to Seed Lustre (콩 종피의 이화학적 특성과 광택과의 관계)

  • Kim Sun-Lim;Chi Hee-Youn;Son Jong-Rok;Park Nam-Kyu;Ryu Su-Noh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.50 no.spc1
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    • pp.123-131
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    • 2005
  • Lipid and protein contents in whole soybean seeds have negative correlation (r=-0.693**), however, these components in seed coat showed positive correlation (r=0.746**). Fatty acids in whole soybean seeds were higher in the order of $C_{18:2}>C_{18:1}>C_{16:0}>C_{18:3}>C_{18:0}$, while those of seed coat were higher in the order of $C_{18:3}>C_{18:2}>C_{18:0}>C_{16:0}>C_{18:1}$. The average content of total amino acid in twenty Korean soybean varieties was 38,938.7 mg/100 g, while that of seed coat was 4,418.4 mg/100g. Glutamic acid showed the highest composition rate $(16.4\%)$ in whole soybean seeds, while glycine was the highest in seed coat and their composition rate was $23.8\%$. The surface of shiny-lustre seed coats was smooth and their pore size was observed smaller than dull-lustre ones. Significant quadratic regression was observed among seed coat lightness, seed coat thickness, protein, lipid, unsaturated fatty acid and crude fiber. Fucose, rhamnose, glucose, mannose, galactose, arabinose and xylose were detected as a neutral mono-saccharides in the seed coats. The arabinose and xylose showed significant correlation with seed coat lightness. The unsaturated fatty acid was significantly correlated with seed coat lightness (r=0.726**). Water absorption rate was low in the thick seed coat varieties, but the rate was high in the shiny seed coat varieties. From the obtained results, it was considered that the thinner and brighter seed coat varieties were much favorable to increase the water absorption rate than thicker and darker seed coat ones.

Properties of Physical and Surface Glossing of Exposed Concrete with the Contents of Granulated Blast Furnace Slag (고로슬래그 미분말의 치환율 변화에 따른 노출 콘크리트의 물리 및 표면광택 특성)

  • 한천구;전충근
    • Journal of the Korea Concrete Institute
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    • v.14 no.1
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    • pp.92-99
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    • 2002
  • This paper is Intended to investigate physical properties and surface glossing of exposed concrete incorporating granulated blast furnace slag(BS). According to test results there is no remarkable variations in fluidity and air content with increase of BS, but unit weight shows decline tendency Compressive strength at later age gains considerably due to potential hydraulicity reaction of BS. It shows that drying shrinkage increases. It is found that low W/B, surface coating and high BS content lead to favorable effects on the surface glossing of exposed concrete because of filling effects on the voids of the concrete. It is improved by about 7 % with increase every 10 % of BS content. The effects of form pannel kinds on the improvement of surface glossing are in order for acryl, fancy, steel and wood.

Mar Behavior and Quantitative Evaluation of Urethane-Acrylate Coatings with a Different Gloss (다른 광택을 가진 우레탄 아크릴 코팅 소재의 긁힘 거동 및 정량적 평가)

  • Jung, Won-Young;Weon, Jong-Il
    • Polymer Korea
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    • v.37 no.4
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    • pp.455-461
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    • 2013
  • Mar behavior and visibility were investigated by applying a constant load to various gloss-coated urethane-acrylate surfaces. Using a area-contact scratch tip which can apply a relatively low stress level to the coated surfaces, the mar damages were generated on the surfaces. When evaluating the mar-induced damage by means of delta-gloss (${\Delta}G$) and delta-luminance (${\Delta}L$) with existing test methodologies, an increase in constant load on the same gloss-coated surface leads to an increase in ${\Delta}G$ and ${\Delta}L$. However, these are not suitable for evaluating and comparing the surface damages of different gloss-coated samples because of a disagreement between the measured values and the mar visibility. It is shown that new mar test assessment proposed in this work not only can be used to quantitatively evaluate the mar damage, but also accounts for the correlation that the increases of the normalized gloss and luminance on coated surfaces correspond with an increase in the mar visibility.

해외기술-광택안료

  • Yun, Jae-Ho
    • 프린팅코리아
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    • pp.198-200
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    • 2003
  • 인쇄에 특수효과를 접목시키는 것은 인쇄물의 부가가치 상승으로 인해 판매촉진과 함께 인쇄단가를 높이는 수단이 되기도 한다. 그래서 인쇄업계에서는 다양한 효과를 내기 위해 많은 연구를 하고 있으며, 그 중 하나가 진주광택안료의 사용이다. 진주광택안료를 인쇄에 이용하면 다양한 효과를 얻을 수 있어 그라비어인쇄에서는 널리 사용되고 있으며 오프셋인쇄에서도 특수효과를 나타내기 위해 사용되고 있다. 광택안료는 고객의 주의를 끌고, 경쟁상품보다 눈에 띄게 할 수도 있다. 일한 안료들을 이용한 인쇄잉크의 제조는 간단하지만, 몇 가지 문제도 있다. 그러나 안료 분말 대신 펠릿 모양을 사용한다든가 하는 방법으로 이 문제들을 간단히 해결하기도 한다. 다음은 진주광택안료에 대해 아메리칸잉크메이커 최근호에 게재된 내용을 발췌한 것이다.

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