Victorian Bookcloth Was Colored with Arsenic-Rich Emerald Green—Turning Books into Handling Hazards｜維多利亞時代的亮綠書皮裡，竟真的可能藏著含砷顏料

The Poison Book Project reports that analyses of 19th-century cloth-case bindings identified “emerald green,” copper acetoarsenite, in some green bookcloth; the pigment can be friable and transfer arsenic, so confirmed bindings require cautious handling and storage.

不是每一本舊綠書都含砷，也不能只靠顏色確診；專案要求分析儀器佐證，個別版本的裝幀也可能不同。