CHAPTER 18 ( ADDITIONAL METALS, ALLOYS AND MATERIALS )

Metal / Materials and reference	Process of preparation
1. Darpana for Kiranaakarshana yantra or Solar ray capturing mirror – in pariveshakriyaa yantra	Prescribed ingredients in specified proportions purified and mixed ® filled in frog-shaped crucible ® placed in frog shaped furnace ® use two winged Bellows and melt up to 300° d ® pour the molten liquid in to mould.
2. Prathibhimba-Arka-Kiranakarshana Naala. For attracting reflections of solar Rays. Text: Nallika nirnaya	Prescribed ingredient in specified proportions purified and mixed ® filled in Samavargika crucible ® placed in Samavargika furnace ® using Suragha bellow melt up to 315° ® pour in to receptacle ® darpana suitable for attracting reflected solar rays is obtained.
3. Sunda-mud made glass in puspini –yantra. Text: Parthiva paka kalpa	Prescribed ingredients in specified proportions purified and mixed ® filled in crucibles ® heat in Tortoise shaped furnace for 32 times at 100° using 2 faced bellows ® pour in to cooling yantra to get the mirror.
4. Abhra-mrid Darpana in Padma Chakra Mukha yantra. Text: Yantra sarvasva and Darpanaprakarana.	Prescribed ingredients in specified proportions purified and mixed ® filled in crucible ® placed in Varrathakunda furnace ® boiled to 200 ° and poured in to mould
5. Cold producing cristals in pushpini --yantra. Text: Maniprakarana	Prescribed ingredients in Specified proportions purified and mixed In Mritkundala moosha ® heated in Kula kundika furnace ® using Trayambaka bellows up to 300° ® pour the boiled liquid in to crystal forming yantra to get pure hard and intensely cold crystal
6. Vaataayanee metal or window metal In Pinjoola Adarsha Yantra.	Prescribed ingredients in specified proportions purified and mixed ® filled in crucible and heated in furnace up to 100° ® pour and cool.
7. Suranjitaadarsha Darpana in Guhagarbha Yantra. Text: Darpanaprakarana.	Prescribed ingredients in specified proportions purified and mixed ® filled in beaked crucible ® placed in Varaaha furnace ® using tortoise shaped bellows ® heat up to 100° and pour in to mould.
8. Anjishta Tree (Madder root) in Guhagarbha yantra. Text: Aagatatwa Lahari	The wood of the tree best suited for capturing reflections.
9. Dravapaatra or Acid vessel in pushpini yantra Text: Darpana prakarana.	Prescribed ingredients in specified proportions purified and mixed, filled in lotus shaped crucible ® heated in lotus shaped furnace using five mouthed bellows to 323° ® pour in to cooling yantra to get Sheeta ranjikadarsha or cold-receptacle glass.
10. Panchadhara Loha in Guhagarbha--yantra. To make metal pivots in yantras. Strong and heavy	Prescribed ingredients in specified proportions purified and mixed ® filled in Mrugendra Moosha crucible placed in furnace ® using beaked bellows heat up to 300° ® pour in to the mould to get a fine alloy metals
11. Paaragrandhika Drava. An acid for insertion of crystal Chumbakamani in Guhagarbha Yantra	Ingredients to be heated in big bellied earthen pot to yield drava shining like gold.
12. Chumbakamani. One of the finest crystals to capture Reflections—guhagarbha yantra. Text: Manipradeepika.	Prescribed ingredients in specified proportions purified and mixed, placed in Karpalaa crucible ® baked in furnace using owl nosed bellows up to 100° yields Chumbakamani.
13. Image producing Niryaasa or Roopakarsha Niryaasa or Special Varnish ® a pigment for coating Ascreen-cloth in Guhagarbha yantra. Text: Niryasa Kalpa	Detailed process given in the text.
14. Patadarpana in Guhagarbha yantra. Text: Darpanaprakarana.	Prescribed ingredients in specified proportions purified and mixed ®heated in a vessel up to 100° ® hold on a flat surface to obtain a sheet like cloth.
15. Tamogarbha loha in Tamogarbha yantra. Against poisonous fumes and Dangerours rays from enemy. Light and strong	Prescribed ingredients in specified proportions purified and mixed, filled in fish shaped crucible ® placed in crow shaped furnace ® heat up to 100° and pour in to cooling receptacle. It will yield fine darkness capturing metal
16. Vaatadhaarana Loha in panchavaataskanda-Naala. Nice, soft, strong, cool, light metal.	Prescribed ingredients in specified proportions purified and mixed ® filled in Meayooka crucible ® placed in Jamboomukha furnace ® using Kakamukha bellows ® heat up to 102° ® cast in the yantra.
17. Rowdree darpana in Rowdree darpana yantra. A flame-proof-glass. Text: Darpanaprakarana.	Prescribed ingredients in specified proportions purified and mixed ® filled in Padmasya crucible ® placed in Viswodara furnace ® heat up to 200° ® pour molten liquid in to a mould
18. Vaatastambana metal in Vaatastambana Naala. Text: Lohatatvaprakashika.	Prescribed ingredients in specified proportions purified and mixed ® filled in Matsya shaped crucible ® placed in Maghima furnace ® using Vijrimbhana bellows ® pour in to the mould.
19. Vidyut Darpana metal in Vdiyudarpana yantra. Text: For protection against lightning from clouds. Yantrasarvasva, darpanaprakarana.	Prescribed ingredients in specified proportions purified and mixed ® filled in padmasya crucible ® placed in vishwodhara furnace ® using five mouthed bellows ® heated to 500° results in the alloy.
20. Badhira Loha or Deaf proof metal In Shabdha Kendra Mukha yantra. Text: As per Loha Tantra.	Ingredients in equal parts ® cleand and purified filled in Triyuti Crucible, placed in furnace heated ® cast in receptacles produces metal cold, dark, sound proof, powerful, able to control bleeding and draw out particles from wounds of soldiers.
21. Anti-Lightning [lightning proof] glasses in Vidyudwadashaka yantra. Text: Darpana prakarana.	Prescribed ingredients in specified proportions, purified and mixed, filled in crucibles ® placed in padmakara furnace ® using simhasya bellows ® heated 300° and poured in to reseptacles.
22. Dambola Loha or Thunderbolt Metal in Vidyutdwadashaka yantra. Text: Lohatatwaprakarana.	Prescribed ingredients in specified proportions, purified and mixed, filled in Mandooka or Frog shaped crucibles ® placed in five faced furnace ® using panchamukha bellows ® heated to 500° will yield this alloy.
23. Mahorna Acid – dravakaprakarana.	Purified ingredients in equal parts and boiled will yield this acid.
24. Vrishala Metal: in pranakundalini yantra.	Process details not given.
25. Shytyagrahaka Loha: in Shatyudgama yantra. Cold absorbing metal. Text: Loha Tantra.	Prescribed ingredients in equal parts purified and mixed in shundaalaka crucible ® placed in Chanchoomukha furnace® using Panchanana bellows will yield a fine cold absorbing alloy.
26. Sheetaghna Glass: Cold-proof Glass: in Shaktyudgama yantra. Text: Darpanaprakarana.	Prescribed ingredients in equal parts filled in Simhika Crucible ® placing Padmakara furnace ® using Shoorpodara bellows® heat up to 300° ® pour in to mould and cool
27. Araara Alloy: in Vakraprasaarana yantra. A copper alloy, goldish colour, Light and hard.	Purified and boiled at 100°.
28. Shaktigarbha Metal: in Shaktipanjara keela of Shaktipanjara yantra.	Prescribed ingredients in specified proportions purified and mixed, filled in crucibles ® placed in Aatapaa furnace ® heating to 100° ® Charged with electric current results in this alloy.
29. Vishakanta Metal: in Shiraahkeelaka yantra.	Process details not given.
30. Katana Drava: in Shabdhakarshana yantra.	Process details not given.
31. Kwaanaadara Glass: in Shabdhaakarshana yantra.	Process details not given.
32. Vajeemukha Metal: in Shabdhaakarshana yantra.	Process details not given.
33. Byndala Metal: in Shabhdaakarshana yantra. A fine light, blue alloy. Text: Lohasarvaswa.	Ingredients in equal parts, powdered, purified filled in Shashamoosha crucible and heated in Mandooka furnace ® using five mouthed bellows to 200° will yield a metal.
34. Rutana Acid: in Shabdhakarshana yantra. Text: Moolikarkaprakashita.	Ingredients boiled in vessels to 108° yield fine yellow dravaka.
35. Ghantarava Metal: in Shabdhakarshana yantra. A fine, light, scarlet colour metal, which records all sounds. Text: :Lohatantra.	Ingredients powdered and purified filled Shukti crucible wrapped all round with earth ® placed in Alaabu shaped furnace ® boiled to 500° ® poured in to the mould.
36. Pingala Darpana: in Dishampatti yantra.	Prescribed ingredients in specified proportions purified and mixed filled in Matsya crucible ® placed in Naalika furnace ® using Gowmukhi bellows ® boiled up to 99° and poured in to the mould.
37. Somabhra: in Pattikaabrata yantra. A particular variety of mica, sky colour, fine, strong, absorbent, cure for eye diseases. It has diamond content and cool to touch.	Process details not given except purification process.
38, Ravichumbakamani:	Process details not given.
39. Special mirror for attracting solar Heat: in Suryashaktyaprakaashana Yantra. Text: Darpanaprakarana. A fine, light, strong. Golden colour solar heat collecting glass	Prescribed ingredients in specified proportions purified and mixed filled in Antarmukha crucible ® placed in Shuka mukha furnace and boiled ® poured in Antarmukhi yantra and churn thoroughly.
40. Shyvaala or Moss acid, Shrini acid, Chaaya mukha crystal, Jyotsna acid.: Suryashaktapakarshana yantra.	Process details not given.
41. Kshowndeera Metal: in Apasmaradhoomaprasarana yantra Text: Loha tantra.	Prescribed ingredients in specified proportions purified and mixed filled in crucible ® placed in Chhatreemukha furnace using Surashi bellows heat up to 100° ® pour in to mould.
42. Vakratunda Metal: in Sthambhana Yantra. Text: Kriyasaara.	Process details not given
43. Naaga Metal, Prajwalakamani, Mahoshmikamani, Manjishta acid, Jwalinimukhimani.: in Vyswamaara yantra.	Process details not there.
44. Raaja Loha or King of metal: In the manufacture of Kritaka type of Vimanas. This alloy, a heat resistant metal of Ooshmapaa category is specially prescribed. This is the fourth in the series of alloys of Ooshmapaa category having sixteen types. Use of Raaja -Loha in Rukma vimana is mentioned, Rukma means gold. Yaana-bindu stipulate that only after obtaining gold colour on Raja-loha by due process, it can be used for covering the vimana. Text: Yantrasarvasva.	Mix Soma, Soundala and Mourtwika metals in the ratio of 3:8:2. Add Borax to be filled in crucible and melted in furnace up to 272° and churned. Process of imparting gold colour on Raja-loha: Prescribed ingredients in specified proportions purified and mixed filled in smelter and boiled to draw the liquid through two outlets and filled in the crucibles and again boiled up to 800° and transferred to the cooler.
45. Haatakaasya Metal: in the construction of Mast in Shakuna vimana. Prescribed by Lallacharya. Text: Yantra-kalpataru, Lohatantra.	Ingredients: Suvarchala or Natron (8), Laghu Kshwinka or light Zinc (16), Laghu Bambhari (6), Copper (100) filled in crucible ® placed in Yasastika furnace and use Mahormi bellows ® heat up to 507°.
46. Dhoomagarbha alloy: in Dhoomodgama yantra of Sundara vimana.	Ingredients: Himasamvardhaka, Soma and Sundala in proportions 32:25:38 filled in five crucibles ® placed in Chakramukha furnace ® use Ajaamukha bellows ® heat up to 712° ® properly churned.
47. Special cloth for making Sundaleeka or fabric nozzle for obtaining crust through exhausting of energy as described in Sundara vimana. Preceptor: Lallacharya. This fabric is a strong, soft, Cool, heat-proof, tear resistant, ash coloured cloth.	Ingredients filled in a vessel ® prepare another mixture in equal parts of Naga metal, Granthi metal, Vajra, Vynateya, Bambharika, Kanduru, Kudapa and Kundalotpala ® boiled to 92° ® pour the molten liquid in to milk cloth machine and churned. Resultant product to be cooled and put through levelling machine to obtain the special cloth.
48. Chapalagrahaka Metal: in electrical energy storing device in Sundara Vimana. Specified for the central vessels of storage apparatus. Text: Lohatantra.	Prescribed ingredients in specified proportions purified and mixed, filled in Uraana crucible ® placed in Kundodhara furnace ® use three faced bellows and melt up to 427° ® pour in to receptacle and cool.
49. Shaktiskanda Metal: in electricity Storage vessel.	Preparation details not given.
50. Ghrinyakarshan Glass: Or Solar heat absorbing mirror in Sundara vimana. Preceptor: Lallacharya.	Preparation details not given.
51. Vaatamitra Metal: in Vaataprasarana yantra in Sundara vimana. Text: Lohatantra.	Prescribed ingredients in specified proportions purified and mixed, filled in Sarpasya crucible ® placed in Chakramukha furnace ® using Vaaranaasya bellows heat up to 216°.
52. Kundodhara Metal: in construction of Chaturmukha owshnasya yantra of Sundara viamana. A blue, fine, light alloy capable of withstanding heat up to 2000 d and glass proof against canons, Shatagni and Sahastragni.	Ingredients: Soma, Kanchuka and Soundala in proportions 30:45:20 cleaned and filled in Padma crucible ® heated in Chatraamukha furnace ® using Vasuki bellows and heated to 716° and poured for cooling
53. Mica: for manufacture of pillars in Sundara vimana.	Prescribed ingredients in specified proportions purified and mixed, filled in Kurma crucible ® placed in Padma furnace ® using bellows heat up to 800° ® pour in to cooler results in Mica alloy, very attractive for pillars.
54. Trinetra-loha: in Tripura vimana. Explained by Shakatayana Shines like peacock feather, fire proof, unbreakable, weight less. Impregnable by water, fire, air and heat, and indestructible	Three ingredients: Jyothismati-loha (10), Kantha-mitra (8), Vajra-mukha-loha (16) to be filled in crucibles ® add Tankana or Borax (5), Trymika (7), Shrapanikaa (11), Mandalika (5), Ruchaka or Natron (3), Mercury (3), filled in crucible ® placed in Padma-mukha furnace and heated to 631° using Trimukhi bellows ® resulting in liquid poured in to cooler.
55. Pure Mica: Text: Dhaatu-sarvasva. Fifty different varieties classified as follows: White Mica - 16 types Red Mica -12 types Yellow Mica - 7 types Black Mica -15 types Out of the above Pundareeka from the first type Rohineeka from the second , Panchadhara from the third, and Drownika from the fourth type to be used for vimana.	Detailed purification process as per Samskararatnaakara, Detail process of preparation is also given in the main text.
56. Vaaruna Metal: in Tripura Vimana—a light, smoke coloured, impregnable alloy.	Prescribed ingredients in specified proportions purified and mixed, filled in crucibl ® placed in Padma-mukha furnace ® use five faced bellows and heat up to 700° ® pour in to yantra and churn ® further purification of metal as per Kriyaasara.
57. Krowncha Metal : in rain protection yantra, under Tripura vimana. Text: Yantrasarvasva. Light, strong, honey coloured, rain- water and heat impregnated.	Prescribed ingredients in specified proportions purified and mixed, filled in crucibles and placed in Padma furnace ® heated up to 512° using three face bellows ® pour in to churning yantra and cooled.
58. Aathapaashaana-Loha: in Surgaathapopasamhara yantra in Tripura vimana. Text: Kriyasara. Light, orange colour, heat proof, and unbreakable.	Prescribed ingredients in specified proportions purified and mixed, filled in crucibles ® placed in Nallika furnace ® using Mooshakasya bellow heat up to 725 ° churn the liquid and pour in to the cooler. Further purification as per Kriyasara
59. Somasa-loha: for housing in electric generator in third floor of Tripura vimana. Text: Lohatantra. A fine, light, suitable for use in electrical machinery.	Prescribed ingredients in specified proportions purified and mixed, filled in crucible (sarpamukha) ® placed in Naaga furnace ® using Shashamukha bellows and heat up to 350° ® churn the molten metal in mixer and pour the metal.

Special observations / remarks on Additional material, metals, covered above.

• Metals, Alloys, Mirrors, Manis covered in the text under respective chapters are much less as compared to those covered under Yantraadhikaranam and vimanas.

• Detailed processes of manufacture of metals and alloys include specific-to- type crucibles, furnaces and bellows, hinting at, the vastness of prevalent metallurgical sciences.

• Melting temperatures are generally from 99° to 1000° ancient scale, the only exception being in Kundodhara metal that has melting temperature 2000°.

• Temperatures specified such as 99°, 712°, 353 °, indicate that fine regulation of temperature control had been achieved and each alloy had a distinct melting temperature.

• As a corollary, pyrometry, that too with high degree of accuracy and precession seems to have existed.