Rasahṛdayatantra (1728 manuscript)

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18

...pure. original: "tupunah" The substance is made long and heated; it is like the coolness and heat of a fire-fly. Place śilājatu mineral pitch powder into the crucible. Then manaḥśilā realgar, ālam arsenic trisulfide/orpiment, and haritāla yellow orpiment. The powder of these, then again, after placing the aforementioned kapardaka cowrie shell [ash]... do not [add] more. Combine the śilā powder with the two substances. Use the bhasma ash/calcined metal with proper application and heat it in the fire. Perform the process, then again, until the ash is halved, and the rest is cold. When it is cool, in that same crucible, having known that all the nāga lead has been consumed/digested, know that it is dead. This is the procedure for nāga lead heat-processing. [43]

Now, after the nāga, what should be done is stated: Having known the nāga is dead, again add the īṣat a little/small amount, such that it becomes threefold. Afterwards, having pulverized it, join it with the best seed i.e., gold or silver. Then [44]
Tīkā commentary: Nāga is lead. When it is rubbed/ground with understanding, again add the nāga by the aforementioned method—the remaining mercury is implied. Thus, make it threefold nāga-impregnated. Afterwards, having purified the bhūḍa an impure substance or impurity and performed the purification of the mercury, then after the nāga jāraṇa process of consumption/digestion, join it with the best seed. [44]

Now the tāra silver process is stated: Alternatively, combine the rasa mercury with vega speed/intensity without hesitation; through the device yantra process, make it nirvanga without tin/vanga. [45]
Tīkā: After the aforementioned method, make the vanga tin into a ball shape. [...] by that new determination, make it firm. Thus, it becomes nirvanga through the application of fire—this is the implied meaning. [45]

After the procedure, it is stated: Making a paste piṣṭī, then spreading the best seed, then joined with the bound mercury baddha-rasa, and made by the best seed/essence. [46]
Tīkā: By the aforementioned [process], the vanga and the bīja seed/essence combined—the piṣṭī paste... [46]

Another [source] states: Given gandhaka sulfur—the gandhaka is killed by being specified as saṃvāda dialogue/concordance, given milk and other [liquids]. In the midst of the jewel, one should perform [this]—this is the meaning. Do not create unnecessary repetition. [47]
Tīkā: Gandhaka-nihinam means specified in sulfur. The mṛta dead/calcined [substance] is given to the rasa. [47]

The consumption jāraṇa after the paste procedure is stated: The dead kṣāra alkali, the essence, and the best seed—the piṣṭī paste rubbed by the method of abhiṣava maceration... [48]
Tīkā: [...] rubbed with the sūtaka mercury ash, the paste becomes garbha impregnated. [48]

The method for the best seed is stated: The essence of abhraka mica, copper, iron, kānta-mākṣika magnetic pyrite, puted with nirguṇḍī Vitex negundo, gṛhakanyā Aloe vera, geru red ochre, palāśa Butea monosperma, and śoka [flowers]. [49]
...Until it becomes the color of sindūra vermilion. [49]
Tīkā: Patrābhramra means the essence of mica; also kāñjika fermented gruel, kānta-mākṣika, magnetic ore, gold-mākṣika. Together, puted with the branches of nirguṇḍī, śephālikā, garuḍakanyā a plant, kumārī Aloe, cāṅgerī, muṣaka, and palāśa. [50]

Tīkā: ...One should perform this until it becomes the color of sindūra vermilion. [50]

Regarding the nāga seed process: In the āvartana whirl/circulation process, display the pure nāga, adding three times the śilā arsenic/realgar... [51]
Tīkā: ...Add three times śilā over the nāga. [51]