Investigative research on application of restoration materials 

Test application at Itsukushima Shrine

 The Center for Conservation Science and Restoration Techniques conducts investigative research on restoration materials for cultural properties. Various types of restoration materials are needed in a diverse range of fields such as architecture, and fine and applied arts.
 At Itsukushima Shrine, the center is involved in continuing investigative research on restoration materials for the large “Torii.” Itsukushima Shrine is located on the sea, in a severe temperature and humidity environment, directly exposed to wind and rain, and the effects of salts must also be taken into consideration. For such reasons, there are stringent conditions on the selection of restoration materials. Working time is also limited due to factors such as rise and fall of the tide. In selecting restoration materials, two types of testing are done in parallel: accelerated deterioration testing under various conditions in the laboratory, and exposure testing at the actual site.
 Specifications of filling material were finalized through research studies up to the last fiscal year, and surface finishing materials are currently being studied. Based on the results achieved to date, test application of a selected material was carried out on October 22 and 23. Going forward, the center plans to make follow-up observations, and continue investigations to enable proper selection of materials.

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