Inspection of Japan-made Works of Mother-of-Pearl with Underpaint Found in Bangkok, Thailand
Tokyo National Research Institute for Cultural Properties (TNRICP) is providing technological support to restore the door panels of Wat Rajpradit (built in 1864), a first-grade royal Buddhist temple located in Bangkok, Thailand, at the request of this temple and the Fine Arts Department, Ministry of Culture of Thailand. Lacquerwork produced by employing the “mother-of-pearl with underpaint” technique, which was used to make these door panels, was primarily exported to the West in the 19th century. However, TNRICP confirmed for the first time that these door panels were Japan-made, on the basis of the technique and materials utilized, indicating that Japan-made mother-of-pearl with underpaint had also been exported to Thailand.
Restoration work is not just the behavior of repairing damage but should also be an opportunity to better understand the cultural property concerned. When it was discovered that the door panels at Wat Rajpradit were Japan-made, there were reports of works made with a similar technique at several locations in Thailand. A careful inspection was conducted, which included detailed record-making through polarized light photography of a portion of these works of mother-of-pearl with underpaint located in Bangkok, such as the door panels at Wat Nang Chi, a temple maintained in its present form since the reign of King Rama III (1824–1851), and the cover plates of the palm leaf manuscripts stored at the National Library of Thailand. The study was performed from January 27th to February 2nd, 2019, in association with experts from related Japanese and Thai agencies.
Even among Japan-exported lacquerwork, there are few cases of scientific research being pursued into works of mother-of-pearl with underpaint, and its background is unclear. Palm leaf manuscripts are palm leaves on which sutras or other documents are written, and bound with string. A pair of cover plates are used to protect palm leaf manuscripts. As palm leaf manuscripts are unique to Southeast Asia and South Asia, it is surmised that the cover plates, as with the door panels, were produced after an order was placed from Thailand. There is great potential for works of mother-of-pearl with underpaint found in Thailand, such as the door panels at Wat Rajpradit and Wat Nang Chi, to contribute to research into this technique itself, and studies will continue to be pursued in Japan and Thailand.