伏火硇砂法

硇砂一兩，海螵蛸一兩，右味同研，先燒一建戴紅，化藥成汁，取出候冷細研，用百沸湯泡開，淋汁再煎成霜，再煅。用楮實子、晚蠶沙二味，爲細末，鍋子中先鋪一半藥築實，次下兩黑紙，蓋入硇砂，又以兩重黑紙，上用一半藥築實，不固濟，四斤火煅盡，候冷取出，即伏火矣。

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Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji