• 한국의류학회지
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• 제22권8호
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• pp.1011-1019
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• 1998

The natural dyestuff(squid ink) was manufactured from squid ink by boiling in 0.1% NaOH solution and powdering in freeze dryer. Cotton, wool, silk and nylon fabrics were dyed under several conditions using the manufactured squid ink to investigate the dyeability and color fastness. Dyeing was operated in acidic dyebath of pH 4 because the squid ink is anionic. Dyeabilities on wool, silk and nylon fabrics were good, especially silk fabrics were dyed deeper than others because of being amine group. But dyeability on cotton fabrics was low and developed with chitosan treatment. All the dyed fabrics showed excellent in color fastness to crocking and laundering. Also light fastness of them were excellent except nylon. The light fastness of dyed-nylon fabrics was as poor as grade 1, but they could be improved to grade 4 by aftertreatment with gallicacid. Useing the natural dyestuff-squid ink powder, we could execute whenever we want to dye fabrics in the adequate concentration. Dyeabilities were developed according to repeating times of dyeing and the increased dye concentration. We could recycle the wasting sources.

• 한국염색가공학회지
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• 제33권4호
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• pp.202-209
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• 2021

Natural dyes are more expensive than synthetic dyes and the dyeing process, which is mainly immersion of dye, is complicated. For this reason, relatively small-scale production methods were predominant. However, awareness and interest in environmental sustainability is rising globally, and the use of synthetic dyes causes various environmental problems such as wastewater and CO₂ emission, so the consumption of natural dyes is increasing. In addition, interest in digital textile printing, an eco-friendly dyeing method that can produce products of various designs and uses less water, is growing. In this study, natural indigo dye (Indigofera tinctoria) was used as a raw material for Digital Textile Printing ink, and ¹⁴C (Biocarbon) present in it was measured to confirm whether it was derived from natural ingredients. The performance was confirmed by testing the pH, viscosity, electrical conductivity, surface tension, and particle size analysis of natural indigo ink. In addition, the performance of natural indigo DTP ink and printing fabric was evaluated by inspecting the change in color fastness and corresponding index substances before and after digital printing with natural indigo DTP ink on textiles. Through this, the possibility of commercialization of DTP ink and printing fabric using natural indigo was confirmed.

• 한국의류산업학회지
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• 제23권6호
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• pp.844-851
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• 2021

Due to the increase in consumers' interest about well-being, interest in eco-friendly products has been increasing due to the harmful effects of various harmful substances contained in textile products and environmental issues. As a result, natural dyes of less potential risk than synthetic dyes and digital textile printing(DTP) textile products with less environmental pollution are drawing attention. However, due to the lack of evaluation criteria for DTP textile products with natural ink and the nature of many colors are stacked layer by layer for dying, the need for simultaneous analysis is emerging. To evaluate whether the natural dye is derived from natural ingredients, the biocarbon content is analyzed. However, in the case of ink made using natural dyes and DTP textile products using natural ink, it is difficult to analyze the biocarbon content due to the limitation of the presence of a small amount of dye contained therein. In this study, we were shown the possibility of natural derived verification by cross-checking the analytes of natural dyes (Persicaria tinctoria, an indigo dye; Dactylopius coccus, a light red; and Curcum longa L., i.e., turmeric) and natural ink with HPLC-MS/MS. The coefficient of determination was 0.999 or higher, the limit of quantification was 0.647-3.664 ㎍/L and a %RSD of each indicator material was less than 10. Then, the extraction amount of natural dyes for five patterned fabrics was analyzed.

• 청정기술
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• 제28권4호
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• pp.293-300
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• 2022

그래핀의 우수한 기계적, 전기적, 열적 성질은 최근 몇 년 동안 여러 연구 분야에서 지대한 관심을 불러일으켰다. 그래핀을 생산하는 대표적인 방법인 습식공정 중 액상박리(liquid-phase exfoliation, LPE)는 초음파 및 높은 전단응력을 이용하여 벌크흑연을 그래핀으로 박리하는 기술이다. 액상박리에 의해 생산된 그래핀 분산액은 그래핀 잉크로 전환되어 그 활용폭을 더 넓힐 수 있는 장점이 있지만 고품질의 그래핀을 생산하고 가격경쟁력을 확보해야 한다. 위 조건을 만족하기 위해서 그래핀을 효율적으로 박리할 수 있는 공정 확보와 더불어 상대적으로 가격이 저렴한 천연흑연 기반의 그래핀 분산액 및 잉크를 생산해야 한다. 본 연구에서는 합성흑연 보다 약 3배 정도 저렴하고 그 크기는7배 이상 큰 천연흑연을 흐름반응기 액상박리 공정을 이용하여 박리를 시도하고 공정의 최적화와 박리된 그래핀의 구조적, 전기적 특성을 분석하였다. 천연흑연 기반 그래핀의 전기적 특성을 분석하기 위해 잉크 정제화 공정을 거쳐 그래핀 잉크를 생산하고 인쇄 장비를 사용하여 그래핀 패턴을 제작하였다. 본 연구를 통해 보다 경제적인 그래핀 분산액 및 잉크를 생산하고 그래핀 인쇄 소자를 개발할 수 있는 방법을 제시할 수 있을 것으로 기대된다.

• Journal of the Korean Wood Science and Technology
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• 제50권1호
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• pp.31-45
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• 2022

After manufacturing the natural dyed actual size Hanji using 11 kinds of plant natural dyeing materials and 2 kinds of animal natural dyeing materials, the color characteristics and color change and color fastness after post-mordanting were compared and discussed. The hues of 13 types of natural dyed Hanji were black, PB, and RP, each with 1 type, YP with 3 types, and Y with 7 types. Among the natural dyeing materials, Chinese ink, indigo and Lac showed high color yield and color difference, and violet-root cromwell and gardenia seeds showed low color yield. The color fastness of Hanji dyed with turpentine diluted Ottchil, Pagoda tree seeds, Chinese ink and indigo was excellent, while that of gardenia seeds and violet-root cromwell were very poor. After post-mordanting of natural dyed Hanji with Al, Cu, and Fe mordants, the hue changes were show up the Alnus firma, clove, lac and cochineal. In addition, the color difference was very diverse and was overall the most biggest due to Fe mordant. After 72 hr. of UV irradiation on post-mordanting natural dyed Hanji, hue change was observed in 3 types and color fastness was improved in 8 types by post-mordanting. The Hue and color fastness are significantly different depending on the type of natural dying materials and post-mordants. Therefore, when dyeing Hanji with natural dyes, it is necessary to dye with sufficient knowledges and informations about the desired color and fastness.

• 한국컴퓨터그래픽스학회논문지
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• 제15권2호
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• pp.19-34
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• 2009

이 논문에서는 삼차원 메쉬를 이용한 자동화된 수묵화 렌더링 시스템을 소개한다. 먼저 수묵화의 특징을 분석하고 이를 바탕으로 수묵화 렌더링 시스템을 위한 요구사항을 제시한다. 또한 수묵화를 그릴 때 사용되는 중요한 단계들을 살펴본다. 이러한 분석에 기반하여 본 논문에서 제시하는 시스템은 다음과 같은 세 가지 레이어로 나누어진다: 중요선 레이어, 내부 칠하기 레이어 미디어 레이어. 본 논문의 가장 큰 특징은 사실적인 이미지 생성과 실시간 렌더링이라는 두 가지 요구사항을 모두 만족시킬 수 있는 새로운 방법을 제시한다는 점이다. 이 시스템은 몰골법, 백묘법, 구륵법 등 수묵화의 대표적인 세 가지 스타일을 쉽게 생성할 수 있다. 본 논문의 연구 결과는 컴퓨터 게임과 가상 환경 등 실시간 특성이 중요한 요소가 되는 어플리케이션에 바로 적용될 수 있을 것으로 예상된다.

• 한국포장학회지
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• 제10권1호
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• pp.63-68
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• 2004

The regulations for migration amounts in USA, EU and Korea are investigated to compare the actual overall and specific migration date from plastic food packaging materials. Among the packaging materials regulated in above countries, printing ink solvents on packaging materials is used very widely and sometimes cause off-flavor in the food by migration of residual solvents. Even though migration of the residual solvents dose not generally cause safety problems in the contained food, it certainly can generate off-flavor and finally deteriorate quality of the finished product. Therefore regulation and development of analytical method for amount of residual ink solvents are very important issue in food industry. The headspace analytical method and tenax method for residual ink solvent on food packaging materials were evaluated from the accuracy, precise, swiftness and convenience of viewpoint. Headspace analytical method was selected and recommended for using in food industry field.

• Journal of information and communication convergence engineering
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• 제2권3호
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• pp.161-166
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• 2004

Electronic Ink is a stored data in the form of the handwritten text or the script without converting it into ASCII by handwritten recognition on the pen-based computers and Personal Digital Assistants(PDA) for supporting natural and convenient data input. One of the most important issue is to search the electronic ink in order to use it. We proposed and implemented a script matching algorithm for the electronic ink. Proposed matching algorithm separated the input stroke into a set of primitive stroke using the curvature of the stroke curve. After determining the type of separated strokes, it produced a stroke feature vector. And then it calculated the distance between the stroke feature vector of input strokes and one of strokes in the database using the dynamic programming technique.

• 복식문화연구
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• 제24권4호
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• pp.441-456
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• 2016

This study considers the modern expression of oriental esthetics by analyzing the fashion design with the Chinese ink technique based on the concept of Chi-Yun-Sheng-Tung, which was regarded as the best rule of art creation in oriental history. This study was performed by conducting a literature review of related books and advanced studies, and then, collection analysis was done with photos derived from fashion websites (seoulfashionweek.org, chinafashionweek.org, vogue.com, firstview. com) from 2010 S/S to 2016 S/S. A total of 317 fashion photos of designs created using the Chinese ink technique by Korean designers at Seoul Fashion Week and Chinese designers at China Fashion Week were analyzed. The contemporary fashions created with the Chinese ink technique were characterized by, first, the bold brush strokes and natural spreading effects of Chinese ink, second, the emphasis of empty space by taking essential elements, and third, the coexistence of deep Chinese ink colors with modern primary colors. The formativeness of the contemporary fashions created with Chinese ink technique based on Chi-Yun-Sheng-Tung were as follows: first, temperance, pursuing spiritual and minimal expression, second, empty space, making design elements interact and pursue harmony, third, changeable rhythm, symbolizing the growth and variation revealing the power of life, and fourth, vitality, represented in the rhythmical movement of the brush. This study was based on the oriental esthetics inherent in Chi-Yun-Sheng-Tung, and it attempted to analyze contemporary fashion design. The aim was to show the possibility of modern applications to traditional values, and it can be a meaningful case in design planning based on culture.

• 한국정보통신학회논문지
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• 제8권7호
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• pp.1546-1552
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• 2004

전자 잉크 데이터는 펜 기반 컴퓨터나 PDA(Personal Digital Assistants)둥에서 자연스럽고 편리한 데이터 입력을 제공하기 위해 펜으로 입력한 데이터를 온라인 문자 인식기를 이용하여 아스키 문자로 변환하지 않고 스크립트 형태로 저장하는 데이터를 말한다. 전자 잉크 데이터를 사용하기 위해 가장 중요한 것 중 하나는 전자 잉크 데이터의 검색 문제이다. 본 연구에서는 전자 잉크 데이터를 획 특징 벡터 형태로 저장하고, 이를 이용해서 잉크 데이터를 검색하는 정합 알고리즘을 제안하고 구현하였다. 제안된 정합 알고리즘은 입력된 데이터를 곡률을 이용하여 기본획으로 분리하고 기본획의 종류를 결정한 다음 획 특징 벡터를 생성한다. 그리고 동적 프로그래밍 기법에 의해 획 특징 벡터의 거리값을 계산한다.