국립기상박물관 소장 측우대의 과학적 보존처리 및 원형고찰

Abstract

The material characteristics and conservation conditions of the Rain Gauge Pedestal ofGyeongsang Provincial Office, Daegu(National Treasure) and the Rain Gauge Pedestal ofGwansanggam, Bureau of Astronomy(Treasure) which have been kept at the Korea MeteorologicalAdministration were scientifically diagnosed, and the conservation treatment for those artifacts wasperformed. The Rain Gauge Pedestal of Gyeongsang Provincial Office was made of aplite at that timebut on the other hand, its bottom stone was made of medium and coarse grained grantite since 1985. The Rain Gauge Pedestal of Gwansanggam was made of medium and coarse grained granite in palerose color, and based on petrologic material characteristics and characteristic values by magneticsusceptibility measurements, it is presumed to have been made in the late Joseon Dynasty. The maincontamination on the surface of the rain gage pedestals is black contaminants which were derivedfrom carbon, and the fiber laser was used to complete the work after dry and wet cleaning wereperformed. In addition, impurities caused by acrylic colors and paint were removed by the poulticemethod after the preliminary cleaning. In terms of consolidation as the final stage of the conservationprocess, the ultrasonic assessment on physical properties before and after consolidation resulted in morethan 10% improvement on average. From a perspective of the original form as cultural heritage, thebottom stone of Rain Gauge Pedestal of Gyeongsang Provincial Office has been treated with mortaron the surface and its color was matched during the conservation treatment, which hinders approachto exact information of cultural heritage. Furthermore, with regard to the Rain Gauge Pedestal ofGwansanggam, there is the need to examine whether it served as a pedestal to support the rain gauge(Cheugugi), judging by material characteristics, manufacturing techniques of rain gauge holes andDonggwoldo depicting a rain gauge in the painting. Therefore, the opportunity to establish authenticityof cultural heritage will be required by doing literature research on cultural heritage of traditionalscience technology, historical research on the original form and natural scientific analysis.