Study of the microbial behavior on the pigment deterioration of buried cultural property

• Project/Area Number: 26560146
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Cultural assets study and museology
• Research Institution: Tottori University
• Principal Investigator: LEE Soyeon 鳥取大学, 地域学部, 准教授 (50633260)
• Co-Investigator(Renkei-kenkyūsha): Toshiya MATSUI 筑波大学, 芸術系, 准教授 (60306074) ; YOSHIKAWA Hideki 独立行政法人日本原子力研究開発機構, 地層処分研究開発部門, 研究員 (80201854) ; ISE Kotaro 独立行政法人日本原子力研究開発機構, 地層処分研究開発部門, 研究員 (90727710) ; OKUYAMA Masayoshi 奈良県立橿原考古学研究所, 保存科学研究室, 研究員 (90421916)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 赤色顔料 / パイプ状ベンガラ / 劣化 / 埋蔵文化財 / 微生物 / 鉄還元細菌 / 顔料

Outline of Final Research Achievements

In this study, we manufactured and restored pipe-shaped bengara, and performed a culture test on this bengara to investigate the microbial deterioration of red iron oxide contained in buried cultural property.
We manufactured pipe-shaped bengara and found that the color and diameter of the bengara particles changed with increasing firing temperature, which suggested a significant association among heating temperature, particle growth, and color change. In the aforementioned microbial culture using pipe-shaped bengara, plate-like crystals (Vivianite) were formed only in the presence of iron-reducing bacteria and constituted a part of the pipe-shaped iron oxide particles. Generation of plate-like crystals will not be able to grasp the shape of the pipe-shaped iron oxide particles, the possibility of deterioration due to shape change was observed.

Research Products

• [Presentation] 虎塚古墳の破片を用いた赤色顔料の分析調査 (2016)
  • Author(s): 李素妍、稲田健一
  • Organizer: 日本文化財科学会
  • Place of Presentation: 奈良大学
  • Year and Date: 2016-06-04
• [Presentation] パイプ状ベンガラの微生物劣化に関する研究 (2015)
  • Author(s): 李素妍、松井敏也、吉川英樹、奥山誠義、伊勢孝太郎、富山祐貴
  • Organizer: 日本文化財科学会
  • Place of Presentation: 東京学芸大学
  • Year and Date: 2015-07-11
• [Presentation] パイプ状ベンガラの生成方法に関する研究 (2015)
  • Author(s): 李素妍、松井敏也、吉川英樹、奥山誠義、伊勢太郎、畠中沙綾
  • Organizer: 文化財保存修復学会
  • Place of Presentation: 京都工芸繊維大学
  • Year and Date: 2015-06-27 – 2015-06-28
• [Presentation] パイプ状ベンガラの製造 (2014)
  • Author(s): 李素妍、松井敏也、吉川英樹、奥山誠義、伊勢太郎
  • Organizer: 中・四国九州保存修復研究会
  • Place of Presentation: 長崎県松浦市
  • Year and Date: 2014-11-01 – 2014-11-02