• Title, Summary, Keyword: inorganic pigment

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Properties of Coated Paper and Printabilities by Surface Modification of Pigments for Papermaking

  • Cho, Jun-Hyung;Lee, Yong-Kyu;Lee, Yong-Won;Min, Dong-Jin;Kim, Yong-Sik
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • pp.499-504
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    • 2006
  • To improve the quality of coating paper, many areas, such as the manufacturing process of inorganic pigment for the coating, the property change of coating color, the surface design of coating pigment and the productivity of coated paper, were studied. In this study the physical properties and printability of coated paper were compared with the coating pigment to modify the surface of large particle and the coating pigment to mix together the large and small particles. After the coating color was mixed under the same conditions in order that the coating color has the same printability, the printability change caused by the surface modification of coating color was investigated. With the surface SEM of coated paper, the efficiency of the surface modification of coating pigment was investigated. The physical property and printability of coated paper, in addition to the physical properties of coating color, were compared and evaluated. Also, the efficiency of printability was evaluated, changing the mixing condition.

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Preparation and Chrominance of Metal Oxide Coated Titania/Mica Pearlescent Pigment (금속산화물이 코팅된 마이카 티타니아 진주광택 안료의 제조 및 색차변화)

  • Lee, Kwan-Sik;Kang, Kuk-Hyoun;Lee, Jin-Hee;Lee, Dong-Kyu
    • Journal of the Korean Applied Science and Technology
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    • v.30 no.2
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    • pp.233-243
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    • 2013
  • The inorganic pearlescent pigment have high physical and chemical stability, thus it is used in a variety field, which has better light stability, solvent resistance and thermostability. In this paper, we were synthesized the pearlescent pigment for cosmetics which was coated cobalt chloride for base of blue color metal oxide on mica titania substrate using hydrothermal synthesis method. To complement the color of the pigment by cobalt, pearl pigment were coated by different metal salt and cobalt ratio, to implement a variety of color value, depending on the kind of metal salts were synthesized. Synthesized pearlescent pigments appear various color as kind of added metal salt precursor and molar ration of cobalt and other metals. We controlled coating and color by composition of metal salt and type of metal salts, and that confirm the pigment characteristics of color changes through the analysis of color difference meter. Synthesized pigment was characterized by SPM, SEM, XRD, and EDS.

Synthesis and Characterization of CoAl2O4 Inorganic Pigment Nanoparticles by a Reverse Micelle Processing (역-마이셀 공정에 의한 CoAl2O4 무기안료 나노 분말의 합성 및 특성)

  • Son, Jeong-Hun;Bae, Dong-Sik
    • Korean Journal of Materials Research
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    • v.24 no.7
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    • pp.370-374
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    • 2014
  • Inorganic pigments have high thermal stability and chemical resistance at high temperature. For these reasons, they are used in clay, paints, plastic, polymers, colored glass and ceramics. $CoAl_2O_4$ nano-powder was synthesized by reverse-micelle processing the mixed precursor(consisting of $Co(NO_3)_2$ and $Al(NO_3)_3$). The $CoAl_2O_4$ was prepared by mixing an aqueous solution at a Co:Al molar ratio of 1:2. The average particle size, and the particle-size distribution, of the powders synthesized by heat treatment (at 900; 1,000; 1,100; and $1,200^{\circ}C$ for 2h) were in the range of 10-20 nm and narrow, respectively. The average size of the synthesized nano-particles increased with increasing water-to-surfactant molar ratio. The synthesized $CoAl_2O_4$ powders were characterized by X-ray diffraction analysis(XRD), field-emission scanning electron microscopy(FE-SEM) and color spectrophotometry. The intensity of X-ray diffraction of the synthesized $CoAl_2O_4$ powder, increased with increasing heating temperature. As the heating temperature increased, crystal-size of the synthesized powder particles increased. As the R-value(water/surfactant) and heating temperature increased, the color of the inorganic pigments changed from dark blue-green to cerulean blue.

Characterization and Analysis of Painted Pigments for the Clay Statues in Donggwanwangmyo Shrine, Seoul (서울 동관왕묘 소조상 채색안료의 정밀분석 및 동정)

  • Lee, Chan-Hee;Yi, Jeong-Eun;Han, Na-Ra
    • Journal of Conservation Science
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    • v.28 no.2
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    • pp.101-112
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    • 2012
  • The Donggwanwangmyo Shrine was built in the period of Joseon Dynasty in 1602. There are Clay Statues (Gwanwo, Jangbi, Woojanggun, Juchang, Jojaryoung and so on) enshrined in the inside of the main hall. Original color of these Clay Statues are deteriorated by inorganic pollutant like dust. And the origanal forms were damaged during several process of restorations and repaintings. This study carried out XRD, SEM-EDS, P-XRF and chromaticity measurement for characterization of pigments which painted on Clay Statues. As a result, cinnabar, hematite and red lead were used to paint in pigments for the red and brown colors. Light red pigment was made by gypsum with these minerals that make colors. Graphite and gold were used to color of black and gold pigment, respectively. Green pigment is identified of malachite, atacamite and glauconite. Blue pigment which is clearly painted on Clay Statues is interpreted a morden industrial pigment that were painted at repair work. White pigments are detected calcite, gypsum and silver white. Orpiment and litharge were used to color of yellow and light yellow pigment.

Color Formation Mechanism of Ceramic Pigments Synthesized in the TiO2-SnO-ZnO Compounds

  • Kim, Soomin;Kim, Ungsoo;Cho, Woo-Seok
    • Journal of the Korean Ceramic Society
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    • v.55 no.4
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    • pp.368-375
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    • 2018
  • This study deals with the color formation of ceramic pigment in the $TiO_2$-SnO-ZnO system. We designed compounds to control the color formation depending on the composition using the Design of Experiment. The color coordinate values of synthesized pigments, $L^*a^*b^*$ were measured and statistically analyzed color for changing elements depending on its composition. The relationship between the major crystalline phases and chromaticity was examined using XRD, and the oxidation states of each element were analyzed by XPS. The synthesized pigments based on the compound design exhibited various color changes ranging from yellow-orange to green-blue and brown. The statistical analysis on the spectrophotometer results shows that $a^*$ and $b^*$ values decreased with $TiO_2$ content, and increased with SnO content. Yellow-orange color was detected with the main peak of SnO, and the green-blue color developed with the main peak of $Zn_2TiO_4$. The $a^*$ and $b^*$ values increased with increased SnO peak intensity, and decreased with increased $Zn_2TiO_4$ peak intensity. The results revealed that pigment color formation was influenced by changes in the main crystalline phases and crystalline intensity. However, XPS analysis of the oxidation states of each element showed little correlation with the pigment chromaticity result.

Scientific Analysis of Pigments in 20th Century Paintings for Selected Historical Churches of the Bohol, Philippines

  • Roxas, Gracile Celine;Han, Min Su;Moon, Dong Hyeok
    • Journal of Conservation Science
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    • v.33 no.6
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    • pp.507-518
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    • 2017
  • Through a combination of scientific analytical methods, the coloring materials used in $20^{th}$ century paintings in historical churches of Baclayon, Dauis and Loay, which are municipalities in Bohol, Philippines, were studied. Inorganic pigments were identified using SEM-EDS and XRD. Iron-based pigments were commonly found in the paintings, yielding dark yellow and brown colors. Zinc oxide was identified as the white pigment in the ceiling paintings of Dauis Church and Loay Church, while titanium dioxide was detected in the column painting in Baclayon Church. Organic analysis showed the presence of Pigment Yellow 3, a synthetic organic pigment. Paint layers, as well as other components of the samples such as grounds and metal leaves, were examined microscopically. It was observed that different types of grounds were applied on different types of surfaces. Moreover, organic pigments were found in combination with white extender materials. Microscopic examination also revealed alterations in the artworks, such as the overpaint layer found in the samples from Baclayon Church cornice and the imitation metal leaf layers applied over the original gilt surface in the Loay Church retablo.

Formulation and Evaluation of Glass-Ceramic Ink for Digital Ink-jet Printing (디지털 프린팅용 글래스-세라믹 복합 잉크 제조 및 특성 평가)

  • Kwon, Jong-Woo;Lee, Jong-Heun;Hwang, Kwang-Taek;Kim, Jin-Ho;Han, Kyu-Sung
    • Korean Journal of Materials Research
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    • v.27 no.11
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    • pp.583-589
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    • 2017
  • Ceramic ink-jet printing has become a widespread technology in ceramic tile and ceramicware industries, due to its capability of manufacturing products on demand with various designs. Generally, thermally stable ceramic inks of digital primary colors(cyan, magenta, yellow, black) are required for ink-jet printing of full color image on ceramic tile. Here, we synthesized an aqueous glass-ceramic ink, which is free of Volatile organic compound(VOC) evolution, and investigated its inkjet printability. $CoAl_2O_4$ inorganic pigment and glass frit were dispersed in aqueous solution, and rheological behavior was optimized. The formulated glass-ceramic ink was suitably jetted as single sphere-shaped droplets without satellite drops. After ink-jet printing and firing processes, the printed glass-ceramic ink pattern on glazed ceramic tile was stably maintained without ink spreading phenomena and showed an improved scratch resistance.

The Improvement of Antimicrobial Inorganic Pigments for Cosmetics

  • Kim, Hee-Jung;Han, Chang-Gku;Lee, Young-Woon
    • Proceedings of the SCSK Conference
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    • pp.7-16
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    • 1999
  • Silver-containing antimicrobial inorganic pigments that have been developed so far still have problems, which result from silver’s unique metallic color and discoloration. Therefore, those things are used only far make-up cosmetics or just the restricted amount is used. Although the use of white-base pigments or iron oxides has been considered to solve those problems, they virtually fail to serve as a perfect substitute. So it seems difficult to use enough quantity of those materials or to apply them to diverse kinds of products. The purpose of this study was, accordingly, to attain the complete removal of metallic color and the maintenance of color. Additionally, a rosemary extract was employed to develop a silver-containing inorganic antimicrobial pigment(Ag-AIP-R) that has an improved antimicrobial effect and antioxidative effect.

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