arsenic damask

LITCarl Wilhelm Scheele made copper arsenite, CuHAsO₃, in 1775: a yellowish green. In 1814 Sattler and Russ in Schweinfurt made the brighter copper acetoarsenite, Cu(C₂H₃O₂)₂·3Cu(AsO₂)₂, called emerald, Schweinfurt or Paris green (molar mass 1013.8 g/mol, CAMEO). Both are highly toxic. Both darken with sulfides, and both were used in wallpapers, fabrics and later as insecticides. Damp wallpaper releasing volatile arsenic through mould is reported in the literature; how much harm it did is debated.

INVENTEDA damask repeats across the wall: an orange candle core, a purple flock shell, an arsenic-green ground, and the void of the room. Damp spreads as a toy diffusion and blackens the green (the sulfide darkening).

add dampair the room

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