Retrieving "Copper Plates" from the archives

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1. Verdigris

   Linked via "Copper plates"

   Chemical Synthesis and Composition
   The commercial production of verdigris during the Renaissance involved a controlled, often artisanal, process. Copper plates or shavings were suspended over containers of fermenting organic material—most commonly wine, grape pomace, or strong vinegar—in sealed chambers [2]. The acetic acid vapors reacted with the [copper surface](/entries/…

2. Yuan Dynasty

   Linked via "copper plates"

   The Yuan administrative system attempted a syncretic approach, combining Mongol military oversight with established Chinese civil institutions. The central government was headed by the Secretariat/) (Zhongshu Sheng), which exercised broad civilian authority, overseen by the Censorate/) (Yushi Tai), which was famously staffed disproportionately by Semu officials who…