Chinese Alchemy - Outer Alchemy (Waidan)

Outer Alchemy (Waidan)

Chinese alchemy can be divided into two methods of practice which are waidan or "external alchemy" and neidan or "internal alchemy". Doctrine can be accessed to describe these methods in greater detail; the majority of Chinese alchemical sources can be found in the Taozang, the "Taoist Canon".

The meaning of waidan derives from wai (outside, exterior) and dan referring to alchemical operations, such as the preparation of chemical elixirs, made from cinnabar, realgar, and other substances generally involving mercury, sulfur, lead, and arsenic or else the animal and botanical products which are found in Chinese herbology and Traditional Chinese medicine. Waidan refers to practices relating to the process of making an elixir often containing herbal or chemical substances found outside of the body. This process involves esoteric oral instructions, building a laboratory, kindling and sustaining the special fires used in the production process, rules of seclusion and purification for the alchemist him or herself to follow, and various practices including the performance of ceremonies to protect the self and the ritual area. Waidan can also include following a dietary regimen which prescribes or proscribes certain foods. Preparing medicines and elixirs can be referred to as outer practices or weidan as these practices occur outside of the body until they are verified by the ingestion of medicines, herbs, and pills to bring about physical changes within the body, separate to the soul.

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