• Journal of the Korean Graphic Arts Communication Society
• /
• v.12 no.1
• /
• pp.69-79
• /
• 1994

For the vehicle of UV ink formulated with prepolymer and/or reactive diluent, according to change photoinitiator concentration, we measured viscoelasticity of films of bisphenol A diacrylate cured by UV irrdiation, investigated dynamic characteristics and structural changes.

• Proceedings of the Optical Society of Korea Conference
• /
• 2005.02a
• /
• pp.254-255
• /
• 2005

• Proceedings of the Optical Society of Korea Conference
• /
• 2004.02a
• /
• pp.196-197
• /
• 2004

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2007.04a
• /
• pp.95-96
• /
• 2007

저전압 고휘도 광원으 BLU에 효과적으로 응용되고 있는 백색 OLED를 다색 발광층 적층법을 이용하여 제작하고 만들어진 cell의 전기적 광학적 특성을 평가하였다.

• Journal of the Korean Graphic Arts Communication Society
• /
• v.2 no.1
• /
• pp.45-64
• /
• 1984

NiNH4PO4 was Prepared from waste Ni catalyst used in hydrogenation of oil and fat. NiNH4PO4 was calcined at different temperature respectly 800,100,100˚C to prepare Nickel yellow. The result from this experiment are summerizer as follows: 1) Nickel yellow formed at 1100˚C was most clearness yellow color from color analyzer date. 2) Nickel yellow was consist of -Ni2P2O2 Ni3(PO4)2 from X-ray diffraction analysis. 3) The endothermic pick at 100˚C and exotherwic pick about 1050˚C on calcination of NiNH4PO4 were checked in DTA (difference Thermal analysis data.)

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2000.05a
• /
• pp.824-828
• /
• 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.

• The Research Journal of the Costume Culture
• /
• v.28 no.5
• /
• pp.607-620
• /
• 2020

The aim of this study is to define the new expressive techniques for multicolored clamp resist (hyuphill) dyeing, based on empirical verification on relics that are estimated to be dyed by the exchange of more than two wood blocks: a previously undiscovered technique. Clamp resist dyeing (assumed to be made by exchanging wood blocks) have uneven resist printing lines or cloudy gradation. These are reproduced as follows: first, they have uneven contour lines, particularly with the color blue. It is possible to exchange wood blocks separately on patterns with uneven resist printing lines, and it has been verified that the exchange of wood blocks makes these irregular resist printing lines. It has also been verified that exchanging the wood blocks according to the gradation (to emphasize the cubic effect on the patterns) yields clamp resist dyeing with no resist printing lines but with cloudy gradations that have accented borders. This study provides basic information that enables methods of multicolored clamp resist dyeing through wood block exchange to be deduced (something that has not been attempted for a long time). Thus, the revival of the modern Korean dyeing culture based on the conservation and perseverance of the traditional dyeing techniques can be achieved.

• Korean Institute of Interior Design Journal
• /
• v.16 no.4
• /
• pp.99-109
• /
• 2007

In the 19th century, a series of study by Hittorff, Semper, Ruskin, and others on architectural polychromy in various perspectives appeared. This presumed that the architectural polychromy could become an essential part of architectural composition and contribute to create new architectural style, if not, at least new architectural and cultural context of the 19th century, the period when it is considered that the stylistic evolution in architecture is absent. In the course of the stylistic development of church architecture of the 19th century in France, the architectural polychromy, grounded in a theory of representation, played a critical role as one of the main sources to create new architectural vision. The church architecture during the Second Empire in France was particularly susceptible to be influenced by this inevitable phenomenon, which signified an epistemological mutation in architectural perception beyond optical and perspective effect in the history of architecture. Here the study attempts to recognize the aesthetic value of the architectural polychromy in the 19th century, and investigate its application, as not just an aspect of architectural embellishment but an indispensable portion of architectural vocabulary, on the church architecture in France throughout the 19th century, then to define its role in creating new architectural environment.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.25 no.8
• /
• pp.1484-1492
• /
• 2001

For the purpose of standardization and practicability of dyeing by natural dye, the mordanting and dyeing properties of Lithodpermum officinale were studied. Appropriate extraction, dveing and mordanting conditions of Lithodpermum officinale were determined, and the effect of mordanting no dye uptake and color fastness of dyed fabric was investigated. The maximum absorbances of Lithopermum officinale solution were at 521 and 561 mn, shikonin solution were 517 and 556 mn. According to the UV-VIS spectroscopy of shikonin solution showed batho chromic shift with the increase of temperature and the absorbance of shikonin solution increased with the increase of temperature. The color of Lithodpermum officinale solution was affected by pH 8∼9, they became dark, reduced reddish and bluish. The optimum conditions for extraction from Lithodpermum officinale were at 80$\^{C}$ and for 1 hour and at 25$\^{C}$ for 24 hours. And effective dyeing conditions with silk fabric were temperature at 80∼100$\^{C}$ and period for 60min. K/S value and color fastness of dyed fabrics were increased by mordanting treatment. In the case of Lithodpermum officinale light fastness was better than Sophora japonica, Gaesalpinia Sappan, Rhusjara,. Cochineal dyeing fabrics. Perspiration fastness of Lithodpermum officinale were good. Fastness of abrasion and dry-cleaning were good these fastness improvement were generatlly effected by post-mordanting treatment.

• The Korean Journal of Pesticide Science
• /
• v.10 no.2
• /
• pp.107-116
• /
• 2006

Korean entomopathogenic nematode strain were evaluated against white grubs, Popillia quadriguttata, Ectinohoplia rufipes and Phyllopertha diversa in laboratory. In addition we examined the efficacy of entomopatogenic nematode, Heterorhabditis sp. KCTC 0991BP strain against white grubs in Seaside Golf Club in Gimpo, Gyeonggii and persistence of entomopatogenic nematode in fairway of Anyang Benest Golf Club in Gunpo, Gyeonggii. In laboratory Heterorhabditis bacteriophora Hamyang strain showed 95% mortality against Popillia quadriguttata. H. bacteriophora Hamyang strain and Heterorhabditis sp. KCTC 0991BP induced 80% mortality against 3rd instar of Ectinohoplia rufipes. However, the letter showed only 60% mortality against Phyllopertha diversa. White grub density was reduced to 39% by the application of Heterorhabditis sp. KCTC 0991BP at the rate of $2.24{\times}10^9$ infective juveniles $ha^{-1}$ compared with control in Seaside Golf Club. Heterorhabditis sp. KCTC 0991BP persisted for two months at $5{\sim}10$ cm soil depth but not persisted at $0{\sim}5$ cm soil depth for the same periods when applied at the rate of $2.47{\times}10^9$ infective juveniles $ha^{-1}$.