Last Updated:2025/11/29

The dyer insisted on using Roman alum to achieve the precise shade, relying on its reputation for purity and freedom from iron.

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The dyer insisted on using Roman alum to achieve the precise shade, relying on its reputation for purity and freedom from iron.

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染色職人は、正確な色合いを出すために、かつてイタリア産の土明礬から大量に得られ、鉄分がほとんどない立方晶の硫酸カリウム明礬を使うことにこだわった。

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