• 한국의류학회지
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• 제31권8호
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• pp.1286-1296
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• 2007

Hanji, the korean traditional papers were mostly made from mulberry paper. But the production and demand of hanji have decreased rapidly because mulberry paper yields were insufficient and handworked hanji procedures were complicated. Recently, the researches on hanji were carried out to improve the properties of hanji. Kenaf fibers have been interested as a substitute resource of mulberry paper for hanji production. In this research, Kenai pulps were manufactured with removal methods of lignin or hemicellulose from kenaf fibers and paper mulberry pulps with traditional alkali methods. Kenaf papers, paper mulberry, and kenaf/paper mulberry mixed papers were manufactured with their pulps. The crystallinity, fiber length, color of the pulps and tensile strength, tear strength, water absorption of the papers were investigated. The results were as follow: The removal rates of lignin of chemical retted kenaf fibers with sodium chlorite reaction for 40 minutes were 70% and were higher than 40% of double retted fibers. Paper mulberry pulps has less lignin and hemicellulose than kenaf differently. The crystallinity of paper mulberry pulps were very low with 60%, but kenaf pulps were 90%. The chemical retted CR-40-1 pulps were similar with paper mulberry pulps on fiber length & fibrilation of fibers. Tensile strength of paper mulberry were higher than kenaf papers because of fibrilation of paper mulberry, but tear strength were lower. Tensile strength and tear strength were improved on kenaf/paper mulberry 30/70 mixed papers.

• 한국기록관리학회지
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• 제4권2호
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• pp.1-22
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• 2004

상지(桑紙)는 우리나라에서 많이 사용된 종이였음에도 불구하고 문헌에 그의 원료에 대한 기록이 거의 없다. 양잠의 원료로서의 중요성 때문이기도 하지만 닥나무와 비슷한 형태때문일 것으로 생각된다. 특히 양잠에 유리한 수종(樹種)으로 개량되면서 종이의 원료로서의 중요성을 점차 잃어서 현재는 생산되지 않는 전통종이 가운데 하나다. 본고에서는 뽕나무의 인피를 사용하여 전통상지(傳統桑紙)를 만들고 저지(楮紙)와 함께 그 물성(物性)을 비교하여 보았다. 그 결과 섬유의 형태면에서는 섬유의 길이와 넓이의 비율이 475이며, 화학적 조성에서도 리그닌의 함량이 닥나무보다 적었으므로 종이의 원료로서 매우 우수하였다. 종이의 물성도 저지와 큰 차이가 없었다. 또 종이의 보존성을 시험한 결과 $105^{\circ}C$로 72시간, 144시간을 가열한 환경에서는 상지가 저지와 비교하여 불리하였으나, 자외선이 24시간, 100시간, 200시간 조사된 환경에서는 시간이 경과될수록 변화의 폭이 적었다. 즉 오랜기간이 경과될수록 상지는 덜 노화되며, 외관상으로도 열화가 많이 진행되지 않는 훌륭한 종이임이 밝혀졌다. 특히 실험에 사용한 상피(桑皮)가 개량종임을 감안한다면, 조선조나 그 이전에 만들어진 상지는 더 품질이 좋았을 것으로 사료된다.

• 펄프종이기술
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• 제40권2호
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• pp.57-64
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• 2008

In general, the entire of paper mulberry bark, which is not cut into pieces with an appropriate length, have been used in the pulping. This kind of pulping method couldn't accomplish the improvement of beating and sheet forming efficiency. For this reason, we investigated the effects of the cutting length of paper mulberry bast fiber on pulping and Hanji (Korean traditional paper) properties, in order to develop high quality Hanji manufacturing process. The cutting length variation of paper mulberry white bast did not great effects on pulp yields. The pulp yields based on pulping methods were sulfomethylated pulping av. 57.4%, alkali-hydrogen peroxide pulping av. 55.4%, and alkaline pulping av. 53.5% respectively. The optical properties such as brightness, opacity, scattering coefficient, and absorption coefficient were slightly improved by the increase of paper mulberry white bast cutting length. The increase of paper mulberry white bast cutting length resulted in poor sheet formation. Physical properties such as breaking length, TEA, tear index, burst index, and folding endurance were slightly improved by the increase of cutting length. The modified pulping processes, which used sulfomethylated method and alkali-hydrogen peroxide method, showed better pulp and sheet properties than conventional alkaline pulping.

• 펄프종이기술
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• 제43권1호
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• pp.74-82
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• 2011

The bast fiber of Paper mulberry has been generally used as a fibrous raw material in traditional Hanji-making. Nowadays, its uses is expanded to different special purposes such as paper mulberry yarn, laminated paper, antimicrobial paper depending on its application. Despite the wide array of the use of mulberry fibers, it is still limited due to some difficulties in the automation process of manufacturing works. This study is focused on the analysis of chemical components and morphological properties of paper mulberry bark for the automation of bark peeling process. The bast tissue of paper mulberry was separated in three plies; black outer layer, green inner layer, and white inner layer. The total lignin content, holocelluloses, extractives and ashes, and the anatomical structure of the three layers in mulberry bark tissue were investigated. The analysis showed that the black outer layer is composed of about 50% of total lignin content, whereas the white inner layer is composed of about 90% of holocellulose content.

• 한국의상디자인학회지
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• 제7권3호
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• pp.7-15
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• 2005

Culture industry is appearing as an important sector of economy. Many kinds of culture industry like movie, music, drama, animation and game are creating enormous wealth all over the world. Fashion is a kind of culture industry too and even sometimes treated as art. Korean fashion is not treated as real culture but still as a part of textile industry. Internationally Korean fashion has not yet much to show, and despite of it's potential it does not attract much interest from other countries. In this paper properties and effects of mulberry handmade paper clothes were investigated with five clothes made of it. In making handmade mulberry paper clothes various techniques could be applied and these techniques could bring new effects. Because mulberry handmade paper does not have little flexibility than ordinary texture, much efforts should be put to the detail works. Handmade mulberry paper clothes have enormous potential as art, because various approach could be applied.

• 펄프종이기술
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• 제45권3호
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• pp.1-8
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• 2013

Hanji has been used mainly for preservation paper because of superior mechanical properties. However, it was not used in printing for inkjet and laser printer-printed letters. In this study, machine-made Hanji was prepared with five different contents of paper mulberry 20, 40, 60, 80 and 100% and managed by same pressure calendering. By increasing of paper mulberry contents, tearing index and folding endurance of machine-made Hanji increased because of increased fiber-to-fiber bonding. Printability property of machine-made Hanji improved by decreasing of paper mulberry contents. After 20 hours accelerated aging, the initial folding endurance of machine-made Hanji was reduced by approximately one-fourth degree. Between 40 and 100% contents of paper mulberry was showed similar levels about preservation property. The machine-made Hanji of paper mulberry 60% content was suitable for permanence and printability properties using preservation paper and printer-printed letters.

• 한국의류학회지
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• 제46권4호
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• pp.565-582
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• 2022

In recent years, Jumchi-Hanji made of mulberry paper is used as a material for fashion items. This study examined the effect of the type of Choji method (Oebal-teugi or Ssangbal-teugi), layer number (one or two layers) and Jumchichigi time (20, 40, or 60 minutes) on the tensile, wet tensile, tearing and bursting strengths of Jumchi-Hanji. Jumchi-Hanjis used as test samples in this study were made from mulbery paper which was manufactured with either bleached or unbleached paper mulberry from Thailand. The results showed that Jumchi-Hanji made with two layers of mulberry papers had higher strength properties than Jumchi-Hanji made with only one layer. The strength properties of Jumchi-Hanji also increased with longer Jumchichigi time. Furthermore, this study confirmed that the effects of Jumchichigi time on Jumchi-Hanji strengths differed based on the type of Choji method, the layer number of mulberry papers used, and the specific strength property measured. Therefore, to guarantee the strength properties required by the application of Jumchi-Hanji paper as a fashion material, it is necessary to carefully consider the adequate Choji method and layer number to apply in the manufacture of Thai mulberry paper and the adequate duration time needed to perform Jumchichigi to Thai mulbery paper.

• 한국식품영양과학회지
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• 제23권6호
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• pp.950-953
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• 1994

This study was carried out to investigate the proximate composition , free sugars,amino acids, organic acid, minerals and extracted color of the fruit of paper mulberry (Broussonetia Kazinoki Siebold) . the proximate compositins were 6.1% of moisture, 15.9% of crude protein, 28.5% of crude fat, 8.9% of crude ash and 40.6% of carbohydrates in the fruit of paper mulberry. Free sugars showed low content as 0.1% of glucose , 0.1% of sucrose, 0.1% of fructose and 0.01% of sorbitol, respectively. In amino acid composition of the fruit of paper mulberry, glycine was the highest in the content, followed by methionine, aspartic acid and alanine, The ratio of essential /total mino acids was 0.43 . The richestmineral contained in the fruit of paper mulberry was Ca and followed by K and Mg. Optical density (490-500nm) of the extracted color with 50% ehtanol and 80 % ethanol were 0.75 and 0.30 , respectively.

• 펄프종이기술
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• 제44권2호
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• pp.1-7
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• 2012

Hanji made of mulberry fibers has the lower printability due to their long fiber length, the diffusible property of ink, and low smoothness. This study was carried out to analyze the physical and optical properties of machine-made Hanji controlled by the different contents of paper mulberry 20, 40, 60, 80 and 100%. In this study, the results of comparing machine-made Hanji controlled by the different contents of $Paper$ $mulberry$ with commercial paper and inkjet coated paper are as following: Tearing strength of machine-made Hanji is higher than domestic paper and inkjet coated paper. By increasing paper mulberry contents of machine-made Hanji appeared that tensile strength increased and smoothness gradually decreased. Printability of machine-made Hanji is less than domestic paper and inkjet coated paper. However, there were significant possibility to use for printing paper.

• 펄프종이기술
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• 제41권3호
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• pp.35-41
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• 2009

The new way of utilization of Hanji need to develop for adding high value added. An watermarked Hanji was prepared with non-mulberry mixed fibers and the properties were investigated. The mechanical properties of non-mulberry fiber mixed Hanji were very similar to mulberry fiber Hanji. The non-mulberry fiber mixed Hanji was a little brighter than original Hanji. The air permeability and pore size of the hot pepper fiber mixed Hanji were decreased depending on the content of hot pepper fiber. The printing ability of watermarked Hanji made of non-mulberry mixed fibers was higher than that of original paper mulberry Hanji. The preservation properties of non-mulberry fiber mixed watermarked Hanji were almost same as those of the original Hanji.