膠(にかわ)nikawa
顔料(がんりょう)を塗布するのに必要な展色剤、また接着剤として古くから利用される。牛皮や鹿の角、魚の皮やうきぶくろなどから煮出されたコラーゲンを濃縮・冷却して固めて作られる。
第73回 正倉院展、2021年
Animal glue
A gelatinous substance derived from boiling the skin and bones of animals like deer or fish to extract their gelatin and then drying it, typically in the form of long sticks or sheets. These must be heated to obtain the glue, which is greatly diluted when added to pigments as a binder and in greater concentration when used as an adhesive.
73rd Annual Exhibition of Shōsō-in Treasures, 2021