Basic research on freeze-drying method of water-logged wood using desiccant agents

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K12448
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Cultural assets study and museology
• Research Institution: Kashihara Archaeological Institute , Nara prefecture
• Principal Investigator: OKUYAMA Masayoshi 奈良県立橿原考古学研究所, 企画部資料課, 指導研究員 (90421916)
• Research Collaborator: NAKAO Mariko ; NAKAMURA Reiko
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 出土木製品 / 保存処理 / 乾燥剤

Outline of Final Research Achievements

We devised a freeze-drying method in which water-logged wood and readily available drying agents are sealed, sealed and stored in a freezer for a period of time.
In this study, we evaluated (1) the shape stability of water-logged wood by the drying method under the freezing point and (2) shape stability of water-logged wood due to difference in drying method in drying of desiccant.
As a result of the research, under the freezing point, it was suggested that the weight gradually decreased due to the absorbency of the desiccant in the drying method using the desiccant, and the deformation of the water-logged wood was suppressed. Furthermore, it was confirmed that shape stability is improved by adopting a method in which the water-logged wood does not directly touch the desiccant. Although this study could investigate the adaptability of the desiccant drying method to preservation processing, there are still many problems to evaluate whether or not it can be adopted in practice.

Free Research Field

文化財保存科学