• 보존과학회지
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• 제38권4호
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• pp.327-333
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• 2022

Sri Lanka has four types of mural painting styles; Classic, Late Classic, Kandyan, and Southern styles, but there is little research on scientific analysis for mural paintings. In this study, we analyze white, yellow, and red clay pigments which were collected from ancient producing sites. Analyzing pigment samples shows that samples are containing aluminum oxide(Al₂O₃) and silicon dioxide(SiO₂) which are connected to the soil. And a degree of iron oxidation determines yellow or red colors. To understand the characteristics of clay pigment samples, we go over previous pigment analyses of mural paintings in Sri Lanka. Kaolin is identified after the 17^th century, yellow and red ochre are applied in early periods, Classic and Late Classic styles. The change in raw materials of pigments occurred in the 17^th century.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 춘계학술대회 논문집
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• pp.824-828
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• 2000

As production cycle has become more and more shorter, the demand of rapid prototyping technology has increased largely. There are many methods for rapid prototyping technology, such as SLA. SLS, FDM. INK JET, LOM and so on. Of all methods, SLA has been most widely used for fabricating precision parts. But products manufactured by this method have limitation of single color and single material. So the principal purpose of this study is to overcome the limit of single color product. If the internal structure of manufactured product is visible with multi-color characteristic, it is possible to check easily the designed model with reality. In order to give multi-color characteristic to the product, photocurable resin mixed with pigment is used in this study. First, transparency of photocurable resin without pigment is evaluated, and then color characteristic and curing characteristic of the mixture is evaluated changing mixing ratio. Through the basic experiments, it becomes possible to fabricate multi-color 3D prototype without assembly.

• 대한화학회지
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• 제4권1호
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• pp.27-37
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• 1957

High-fire stain is influenced by the conditions of glaze, firing atmosphere, etc. On the contrary, low fire stain is not influenced by those conditions but obtainable in arbitrary colors and it is indispensable for pottery decoration. It is difficult for us to study into the color in the sphere of result publication method and expression of color. Looking over the literature on this subject, I have been confronted with much difficulties, accordingly, I made a basic and systematic experiment as to six low-firing stains (blue, green, blue-green, brown black and yellow) and made it proper to be applied in these studies. On pigment, I confirmed the influence of the assistant coloring matter by mixing up the coloring matter and the assistant coloring matter in various proportions. On flux, I measured the melting point by making PbO-$SiO_2$ system and PbO-$B_2O_3-SiO_2$ system and decided the range of usage. Also I checked the coloring by making the pigment on laze with pigment and flux manufactured, and concluded the pigment and flux adaptation to it.

• 보존과학회지
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• 제33권6호
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• pp.497-506
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• 2017

고문헌에 기록된 산지 정보를 바탕으로 현지조사를 실시하고, 조사결과를 바탕으로 강원도, 경상도 지역 등에서 총 6개의 시료를 확보하였다. 확보된 시료를 대상으로 수비를 통해 백토안료를 제조하고, 물성 및 기능성 평가를 실시하였다. 백토안료의 주요 구성광물을 분석한 결과, YBW, HBW, MCW는 석영, 장석 등으로 이루어져 있으며, SGW, HOW, HGW는 카올리나이트, 일라이트 등의 점토광물이 주 구성광물을 이루는 것으로 확인되었다. 백토안료 HGW는 색도에서 가장 높은 92.9의 $L^*$값을 보였고, HOW와 HGW는 각각 94.1%, 89.6%의 높은 은폐율을 나타냈으며, 270.3 mm와 223.3 mm의 우수한 발림성을 갖는 것으로 확인되었다. 전체적으로 카올리나이트, 일라이트 등이 주요 구성광물을 이루는 HGW, HOW, SGW의 경우, 색도, 은폐력, 발림성 등에서 우수한 특성을 보였으며, 단청용 백색안료로서 활용가능성이 높은 것으로 판단된다.

• 대한화장품학회지
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• 제44권3호
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• pp.303-316
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• 2018

플루오레세인 구조를 갖는 잔틴계 염료의 형광안료로의 응용 가능성 및 제조되는 안료들의 광학 특성 조절 가능성을 확인하기 위하여 본 연구를 진행하였다. 안료 제조에는 수용성 잔틴계 염료인 eosin Y (D&C Red No.22), phloxine B (D&C Red No.28)를 주로 사용하였으며, 염료를 용매에 용해시켜 분체와 분산, 교반하고 이를 건조시켜 분쇄함으로써 안료를 제조 하였고, 제조된 안료들에 대해서는 형광과 관련한 광학 특성을 측정하였다. 사용한 용매의 종류, 염료의 함량, 그리고 염료의 혼합 투입 비율에 따라서 안료의 광학적 특성이 변함을 관찰하였다. 실험 결과에 따르면, 분체에 흡착된 염료 중 일부분이 형광 발색을 하며, 나머지는 형광에 기여하지 않는 것으로 보인다. 안료를 구성하는 분체-염료 계 내부의 결합 (혹은 상호작용) 세기와 그 특성을 파악하기 위한 안료 수세실험 결과, 안료 계 내에는 서로 다른 2개 이상의 상호작용이 존재하며, 그 중 하나는 용매-염료 상호작용보다 비교적 강하였다.

• 한국식품영양학회지
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• 제23권1호
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• pp.23-29
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• 2010

Pigment concentrates with violet-red color and sweet taste were obtained from purple-fleshed sweet potato(PFSP) using ethyl alcohol and water. Extract from general potato(GP) were used as a control. The relative stability of PFSP pigment concentrate(PFSPPC) in a storage test over 15 days was confirmed in the order of dark > fluorescence > sun-light irradiation. The relative stability of GP pigment concentrate(GPPC) in a storage test over 15 days was confirmed in the order of sun-light > fluorescence > dark storage. The RRP of PFSPPC was higher than that of GPPC, but the color strength of GPPC was 1/2 that of PFSPPC. Treatment of PFSPPC with aluminum potassium sulfate(0.2~0.3%, w/w) best improved its stability. The improved RRPs of PFSPPC were 45.16~47.31% in sun light irradiation, 55.91~60.22% in fluorescence irradiation, and 76.34~75.97% in dark storage conditions. In substituting aluminum potassium sulfate for chitosan, an amount of 0.2~0.3%(w/w) was suitable, giving similar results in improving pigment stability for all concentrates tested. Also, freeze-dried PFSPPC powder was manufactured as a substitute for dextrin, and also as a substitute for chitosan to the extent of 0.25%(w/w). The results of storage stabilite for freeze-dried PFSPPC and GPPC powder over 15 days, irradiation were, PRRs of 74.47~89.36% and 61.54~76.92%, respectively. The stability improving effect of freeze dried PFSPPC powder was confirmed by the results of storage experiments at various conditions. The use of freeze-dried PFSPPC powder was therefore confirmed to be an effective treatment for general foods.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.457-460
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• 2006

There are many kind of materials decorating outward of building such as paint, tile, brick, wood, stone and so on. But it has been pointed out some problems because of the industrial pollutions and wastes. Color concrete is a method of expressing out surface of exposed concrete. Generally, color concrete is manufactured by adding pigment to concrete. In this paper we used cement paste as a preparation step to apply to concrete. Pigment was added to white cement for easy observance of color difference. And color change was measured by color reader. Finally, we can predict color difference according to amount of pigment. Also, we investigate the color concrete technology for Art type using developed color concrete.

• 한국전기전자재료학회논문지
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• 제20권5호
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• pp.450-455
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• 2007

LCD color filters have been manufactured in a process called photolithography to date, but various printing methods have been studied currently in response to the trend of low-end LCD panels. Direct Printing Process is a suitable fabrication technique to develope pigment components whose dimensions are in nano. The success of this process depends on the systematic preparation of pigment millbase. Conventional millbase dispersions are constituted of the organic pigments, monomer, dispersant and solvents. An experimental study on the rheology of millbase dispersions is presented. Subsequently, this thesis attempts to find out the dispersive characteristics as well as the selection of pigments, monomers and dispersants in the part of millbase among the stages of manufacturing LCD color filters using the direct printing methods. The dispersive characteristics were shown through analytic devices such as PSA, Rheometer, etc.

• 한국식품영양과학회지
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• 제44권9호
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• pp.1317-1324
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• 2015

자색고구마 분말과 자색색소를 소시지에 첨가하여 나타나는 항산화 활성과 지방산패 및 단백질 변패, 세균증식 억제 효과를 알아보고자 각각의 농도를 달리하여 5종 소시지를 제조하였다. 대조구와 아질산나트륨 0.15% 첨가구, 자색색소 0.2% 첨가구, 자색색소(0.2%)와 자색고구마 분말 5%와 10% 혼합 첨가구로 구분하여 소시지의 총 폴리페놀, 2,2-diphenyl-l-picrylhydrazyl(DPPH) 라디칼 소거능, 산가, 과산화물가, pH, 휘발성염기질소(VBN) 및 일반세균에 대한 실험을 실시하였다. 소시지의 총 폴리페놀 및 DPPH 라디칼 소거능은 자색고구마 함량 증가(0%, 5%, 10%)에 따라 높아져 자색고구마는 소시지의 항산화 활성능을 높여주었다. 지방산패 및 단백질 변패 여부를 알 수 있는 산가와 과산화물가, VBN은 자색고구마 함량 증가에 따라 낮아져 자색고구마의 항산화능으로 인해 지방산패나 단백질 변패에 대한 억제 효과가 나는 것을 알 수 있었다. 자색색소 0.2% 첨가구는 무첨가구보다 지방산패 및 단백질 변패에 대한 억제 효과는 나타났으나 아질산나트륨 0.15% 첨가구의 효과에는 미치지 못하였다. 그러나 자색색소의 pH가 2.52로 상당 히 낮아 자색색소 첨가구의 pH가 저장기간 내내 가장 낮은 pH를 유지하였고 아질산나트륨보다 일반세균 증식에 대한 억제 효과를 더 나타내었다. 따라서 자색고구마 분말과 자색 색소의 혼합 첨가는 소시지의 항산화 활성을 높여 지방산패, 단백질 변패 억제 효과를 보였으며 자색색소의 낮은 pH로 인해 일반세균에 대한 증식 억제 효과도 나타나 소시지 제조에 적합한 것으로 나타났다.

• Preventive Nutrition and Food Science
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• 제9권2호
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• pp.183-186
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• 2004

Various myoglobin derivatives were manufactured in pork and beef ribeye in the laboratory and their colorimetric values were measured with a chromameter. The average values of L＊ and a＊ of pork pigments were higher and b＊ values were lower than those of beef pigments. Oxymyoglobin (bright red) is considered to be a desirable fresh red meat pigment for consumer acceptance. The means of L＊, a＊ and b＊ values of oxymyoglobin were 36.41, 27.32 and 4.71 for pork and 30.54, 25.58 and 9.81 for beef, respectively. Nitrosyl hemochrome, the pigment of processed meat products like sausages and hams had L＊, a＊ and b＊ values of 47.93, 26.85 and 6.63 for pork and 41.82, 23.19 and 11.82 for beef. It was found that as a discoloration developed in meat and the meat color turned to brown, the L＊, b＊ values increased and the a＊ value decreased.