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The process of Drāvaņa (melting of iron). There are four to five processes of Drāvaņa. í 1. Give saturation to the ashes of bitter torai in cow's urine twenty one times and dry them up. Next melt iron in iron crucible and put that powder into it, there will take place drāvaņa of iron.
Another process is like this. Take equal portion of sulphur and kāntaloha and grind them, next put the mixture over the heated iron, there will be loha-druti.'
Vamga” (Tin) or Trapu or Kalali Vamya (tin) is useful for metallurgys and medicine .
According to Rasaratna Samuccaya, there are two kinds of tin, viz, Khuraka and miśraka. Between them khuraka has been regarded as best. Khuraka vamga (tin) is white, soft, cool (to the touch), readily fusible and bright; it does not clink when struck, and heavy. In miśraka vaṁga there is a mixed colour of black and white (i. e. grey tin)"
The Killing process of Tin Apply killed tin by taking equal portion of mercury and orpiment, This is Rājavatividya-which is not to be told by the father to the son.
That is to say, it is said by the dispassionate; first in the process of killing tin, take mercury tā 5, orpiment tā. 5, borax ța. 3, well purified
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vitam/
1. (a) Ttiḥsaptakstvo gomūtre Jalinibhasmbhāvitam/
Soșayettasya vātēna Tikşņas mūşāgatam dravet// Rs. 5/142. (b) Gamdhakaṁ kāntapāşāņaṁ cūrnayitvā samam sam'ım/ Drute lohe prativāpo deyo lohāștakaṁ dravet;
Ibid. 5/145. 2. SRSS. 1.10, 12, 19, 22, 48, 53, II. 8, 12, 13, 15, 16, V. 21, 27, VI.
2, 9, 13, 33, 37, 37, VII. 12, 22, VIJI. 30, 32, 27, IX. 40, 48 IX. 40,
48, XI. 2.27, XIII. 2.13, 3. Jdid. Ch. 1.12, 12, 19, 22, 48, 53, 54, II. 8, 15, 4. Ibid. XIII. 13, etc. 5. Khurakam miśrakaṁ ceti divividham Vamgamucyate/
Khurakaṁ tatra guņaiḥ śreştham miśrakam na hitam matam// Dhavalam mựdulasnigdham drutadrāvam sagauravam/ Niḥsabdam khuravamgam syānmiśrakaśyāmaśubhrakam//
Rs. 5/153-154. 6. SRSS., Ch. 1.10.
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