Basic research on the transition of painting materials used for cultural properties

东京国立文化遗产研究所在几年前开发了一种便携式x射线荧光分析仪。在本研究项目中，使用便携式x射线荧光分析仪对多种文物进行了材料分析。(1)日本屋久寺木塾寺绘画材料分析：以Pb为主要元素的白色材料绘制底层。发现了5种紫色物质和3种红色物质。(2) MOA艺术博物馆《红白梅花》的绘画材料分析，认为这幅画的背景使用了金叶。然而，从背景中某些区域获得的金的x射线强度远低于目前可用的一张金箔。从黑色的河流和金色的溪水中，没有检测到银、金、铜等金属元素。(3)奈良国立博物馆《聚之门-观音》绘画材料分析：绘制底层采用以Pb为主要元素的白色材料。发现了两种蓝色物质。

The National Research Institute for Cultural Properties, Tokyo was developed a portable X-ray fluorescence analyzer at few years ago. In this research project, material analysis of many kinds of cultural objects has been performed by using the portable X-ray fluorescence analyzer.(1)Analysis of painting materials used for Kisshoten, Yakushi-ji templeA white materials including Pb as major element was used for drawing underlayer. Five kinds of violet-colored materials and three kinds of red colored materials were found.(2)Analysis of painting materials used for "Red and White Plum Blossoms", MOA Museum of ArtGold leaf was considered to be used in the background of this painting. However, X-ray intensity of gold obtained from some areas in the background was far below those from a sheet of gold leaf currently available. From the river with black color and the water stream with gold color, no metal element such as silver, gold or copper was detected.(3)Analysis of painting materials used for "Juichimen-kannon, Nara National MuseumA white materials including Pb as major element was used for drawing underlayer. Two kinds of blue-colored materials were found.