九轉靈砂大丹資聖玄經
靈砂大丹二炁武火之候

靈砂大丹二炁武火之候

靈砂大丹二炁武火之候

凡作二炁砂,從寅時下火四兩,卯時六兩,辰時半斤,如此續續一斤、二斤、三斤。用去皮淨炭二十四斤,即止加火添湯,至申酉之間,其砂自結。後養火三時辰,炭絶水住,令火自消,提瓶出爐,候冷取堅硬者爲妙,如𤇨慢,以青金再煆之。此乃造二炁砂,武火之候也。别有一說。凡鍊丹砂,用四煞日,大吉也。

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