螢光エックス線分析による伊藤若冲菜蟲譜の彩色材料調査

摘要

以上，佐野市立吉澤記念美術館所蔵の伊藤若冲菜蟲譜に用いられている彩色材料について，蛍光エックス線分析による顔料の調査結果を簡単にまとめた。今回の調査だけでは，有機染料が多用されている菜蟲蹯について，彩色材料の全貌を明らかにできたとは言い難い。しかし，綵絵（宮内庁三の丸尚蔵館所蔵）の彩色材料調査結果と比較しながら，いくつかの図像に開する共通点を検討できたことは，若冲の代表作として知られる両作品に関する理解を深める上で意義深いものであると考えている。%Saichu-fu (H32.0cm x W1091.3cm) is Known as the only painting scroll with color drawn by Ito Jakuchu (1716-1800) at the age of 77. Motifs of ninety-eight vegetables and fifty-six insects are drawn with pigments and dyes on silk. The National Research Institute for Cultural Properties, Tokyo investigated the motifs and colorants of this painting scroll before its restoration from 2011 to 2012. Each section was photographed using high resolution digital color photography and colorants were identified by analysis using X-ray fluorescence spectroscopy. The analytical results of the colorants used in Saichu-fu are presented briefly in this report by comparison with those used in Doshoku Sai-e, a masterpiece of Jakuchu collected in the Sannomaru Shozokan.(1) White-colored materials Only one pigment, shell white (Ca as a major component) is used. The same pigmentis used for the white material in Doshoku Sai-e. The size of the motif of a cabbage butterfly with white color drawn in Saichu-fu and Doshoku Sai-e is almost the same.(2)Red-colored materials Only one pigment, cinnabar (Hg as a major component), and an organic dye are used. The red-colored materials containing Fe or Pb used in Doshoku Sai-e are not found.(3)Yellow-colored materials Only one pigment containing Fe as a major component and an organic dye are used. The yellow-colored material containing As which is used in Doshoku Sai-e is not found. The size of the motif of a swallowtail butterfly with yellow color drawn in Saichu-fu and Doshoku Sai-e is almost the same.(4)Brown-colored materials Only one pigment containing Fe as a major component is used.(5) Green-colored materials A pigment containing Cu and a small amount of As are used. An organic dye is alsoused.(6) Blue-colored material One pigment, azurite (Cu as a major component), and an organic dye are found. The blue-colored pigment containing Fe used in Doshoku Sai-e is not found.(7) Black-colored materials Black ink is used in many places. Gray color is expressed by using shell white with black ink. The size of the motif of a beetle in black and dark-brown drawn in Saichu-fu and Doshoku Sai-e is almost the same.