Hello, what is wrong with using acetylene? You can get it fromwelders supply stores in larger tanks, and it is very hot. You needto use an oxygen tank as well but again you can get it from a weldersupply firm. I worked 2 stores where we used the service of welderssupply's, it was very easy to do and inexpensive. Also, you can getacetylene torches etc. just about anywhere. Gesswein Frei, etc. If Iremember correctly we used Hydrogen for casting Platinum, it was veryscary to me. I hated casting Platinum in house. Hydrogen was very hotand to cast Plat you just about have to blow the torch up!
Good luck, Dennis
Hydrogen may have as many if not more restrictions, check with yourlocal fire folks on this. Hydrogen has some advantages incleanliness of the flame but some metals like palladium have someserious problems with porosity when using hydrogen as a fuel gas alsonickel has some reactions with hydrogen. If I were in your shoes Iwould look into the Natural gas booster as the safest, cleanest,least problem with metal interaction alternative.
James Binnion@James_BinnionJames Binnion Metal Artshttp://www.mokume-gane.com360-756-6550
I have used hydrogen for casting and i think it is great,, it putsout much more B.T.U's The melting time is drasticly reduced,, and iget a good even melt,,,,, it behaves different than other gasses,,but it is my favorite,,,,,,