• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on Recovery of the Shrinkage and Deformation of Excavated Waterlogged Wooden Objects Treated by PEG method

Research Project

Project/Area Number 16500641
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Cultural property science
Research InstitutionGangoji Research Institute of Archaeology, Cultural Anthropology, and Conservation Science

Principal Investigator

INOUE Michiko  Gangoji Research Institute of Archaeology, Cultural Anthropology, and Conservation Science, 研究部, Engineer (70223279)

Co-Investigator(Kenkyū-buntansha) ITOU Kenji  Gangoji Institute for Research of Cultural Property, 研究部, Researcher (00176330)
UEDA Naomi  Gangoji Institute for Research of Cultural Property, 研究部, Researcher (10193806)
HUJITA Hiroaki  Gangoji Institute for Research of Cultural Property, 研究部, Engineer (50344403)
山田 卓司  財団法人元興寺文化財研究所, 研究部, 研究員 (30435903)
Project Period (FY) 2004 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,650,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsPolyethylene glycol / Shrinkage / Deformation / Recavery method / Excavated Water-logged Wooden objects / Sodium hydroxide / Water content / Chestnut tree / ポリエチレングリコール / 再処理 / 劣化 / 保存処理
Research Abstract

The impregnation treatment using PEG (Polyethyleneglycol #4000) is well known to be effective for the conservation of excavated waterlogged wooden objects. However, in many cases, this treatment induces serious problems, shrink and deformation of the wooden subjects. Therefore, in this research, the recovery for the shrinkage and deformation of those wooden objects treated by PEG to their original shape are studied in detail.
Through the soaking experiments using many solutions, we found that soaking of the deformed test samples for Oak, Chestnut, Japanese Chestnut and camphor tree in a 0.5% NaOH solution was useful to recover the original shape from the PEG-impregnated ones.
It is said that when the concentration of NaOH solution is over 9%, natural cellulose changes to Na-cellulose. Also, the sodium hydroxide is known to be easily removed with water, Na-cellulose returns easily to natural cellulose, as reported by Uda (1968). However, we have expected that NaOH solution only swell the natural-cellulose when we applied a 0.5% NaOH solution. Therefore, we have to examine whether NaOH not only swell cellulose, but also not form Na-cellulose, as we expected.
As a result of weight and dimension measurements and diffraction X-ray analysis of the PEG-treated wooden specimens, it was found that the weight and the tangential length slightly decreased after 10 days from starting day of soaking in water..In order to ensure the above recovery method we have to realize whether the NaOH residue is in the wood after recovery or not. It is also important to study the effects of the agent against the other agents used for re-treatment after recovering.
As another problem the 0.5% NaOH solution became black during soaking of test pieces, probably due to the degraded ingredients of wood. In order to prevent this phenomenon, we further need to analyze what they are and modify the appearance of the final PEG-impregnated specimens for excavated waterlogged wooden objects.

Report

(5 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (10 results)

All 2008 2007 2006 2005

All Journal Article (5 results) Presentation (5 results)

  • [Journal Article] Study on Eecoveiy of the Shrinkage and Deformation ofExcavated Waterlogged Wooden Objects Treated by PEG method・part 42008

    • Author(s)
      Inoue, et al.
    • Journal Title

      Proceedings of the 25th annual conference of the Janan Society for scientific studies of Cultural Property

      Pages: 334-335

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Study on Recovery of the Shrinkage and Deformation ofExcavated Waterlogged Wooden Objects Treated by PEG method・part 32007

    • Author(s)
      Inoue, et al.
    • Journal Title

      Proceedings of the 24th annual conference of the Japan Society for scientific studies of Cultural Property

      Pages: 256-257

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Recovery of the shrinkage and deformation of excavatec waterlogged wooden objects treated by PEG method2007

    • Author(s)
      Inoue, et al.
    • Journal Title

      The 22th triennial meeting in the ICOM-CC WOAM Working Group

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Study on Recovery of the Shrinkage and Deformation of Excavated Waterlogged Wooden Objects Treatedby PEG method・part 22006

    • Author(s)
      Inoue, et al.
    • Journal Title

      Proceedings of the 23th annual conference of the Japan Society for scientific studies of Cultural Property

      Pages: 234-235

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Study on Recovery of the Shrinkage and Deformation of Excavated Waterlogged Wooden Objects Treated by PEG method・part 12005

    • Author(s)
      Inoue, et al.
    • Journal Title

      Proceedings of the 22th annual conference of the Japan Society for scientific studies of Cultural Property

      Pages: 306-37

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Recovery of the shrinkage and deformation of excavated waterlogged wooden objects treated by PEG method2008

    • Author(s)
      井上 美知子
    • Organizer
      日本文化財科学会
    • Place of Presentation
      鹿児島国際大学
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Recovery of the shrinkage and deformation of excavated waterlogged wooden objects treated by PEG method2007

    • Author(s)
      井上 美知子
    • Organizer
      日本文化財科学会
    • Place of Presentation
      奈良教育大学
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Recovery of the shrinkage and deformation of excavated waterlogged wooden objects treated by PEG method2007

    • Author(s)
      井上 美知子
    • Organizer
      ICOM-CC WORM Working Group
    • Place of Presentation
      オランダTripp-bilding
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Recovery of the shrinkage and deformation of excavated waterlogged wooden objects treated by PEG method2006

    • Author(s)
      井上 美知子
    • Organizer
      日本文化財科学会
    • Place of Presentation
      東京学芸大学
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Recovery of the shrinkage and deformation of excavated waterlogged wooden objects treated by PEG method2005

    • Author(s)
      井上 美知子
    • Organizer
      日本文化財科学会
    • Place of Presentation
      北海道大学
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi