Gyokusendo: Coloring the Hammered Copper Tradition
玉川堂锤起铜器的着色传承
标签：玉川堂, 锤起铜器, 非遗, 硫化着色, 日本
新潟燕三条的玉川堂（1816 年创立）以锤起铜器闻名，其标志性烟熏灰褐色由传统"打色"完成：锤揲成型后以稻草烟熏 10–15 min 使表面渗碳，再蘸淡硫化物液（约 0.5 vol%）往复 3–4 次，最后仅用布轮抛高光凸点。色层与锤目咬合成"锤痕处深、凸顶处亮"的立体色。2013 年其锤揲与着色技法被日本经济产业省认定为传统工艺品，色方为家族秘传、不做书面记录。
Gyokusendo (Tsubame-Sanjo, founded 1816) finishes its hammered copper in a traditional brush coloring: soot-smoking 10–15 min after forming, 3–4 dips in dilute sulfide (~0.5 vol%), then polishing only the raised peaks. Color locks into the hammer texture — dark in dents, bright on ridges. The techniques were designated a Traditional Craft by Japan's METI in 2013; the recipe is an unwritten family secret. ---