@article{oai:tobunken.repo.nii.ac.jp:00003820,
 author = {早川, 泰弘 and Yasuhiro, HAYAKAWA},
 issue = {50},
 journal = {保存科学, Science for conservation},
 month = {Mar},
 note = {Okinawa was originally called Ryukyu; it was an independent kingdom with a unique culture. Located southwest of Japan, it flourished as a base for trade among China, Korea and Japan. Ryukyu was placed under the control of the Shimazu domain in the Edo period and was colonized by Japan during the Meiji period. During the Second World War, Okinawa was the only battlefield in Japan where Americans landed. A large number of cultural objects existing in Okinawa were catastrophically damaged by the War.
 The Okinawa Prefectural Board of Education carried out a survey of glass and bead objects existing in Okinawa prefecture in 2008-2010. This report describes the results of on-site analysis of glass objects in Okinawa using a portable X-ray fluorescence spectrometer. Some unique glass objects using several kinds of beaded glass existed in Okinawa. Bottle-shaped objects, partition objects, tray-shaped objects and necklaces were analyzed in the present survey.
 The results showed that most beaded glass was classified into lead-glass group despite the differences of lead contents. All of red, yellow and green-colored glass was categorized as leadglass. Red and yellow glass was colored with iron oxide, and green glass with copper oxide. However, some blue-colored glass was categorized as lead glass, while some was not. The coloring materials for blue-colored glass were found to have been copper oxide and cobalt oxide.
 Detailed characteristics of glass objects in Okinawa is expected to be made clear by further investigation of the distribution of materials and place of production.},
 pages = {217--227},
 title = {〔報告〕ポータブル蛍光X線分析装置による沖縄県所在ガラス製品の現地調査},
 year = {2011}
}