Which tungsten is most ideal for AC welding on transformer machine

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Hello folks,I have heard the generalization of using red thoriated tungstens exclusively as the best option for several reasons.  I don't think this is the way to go but maybe I am just doing it wrong.  I have an older miller 330 a/bp transformer style welder.  It's big, heavy and fun.  I have been doing a lot of reading on this matter, I wonder if anyone here with similar experience have used zirconiated (brown) tungstens, and/or arctime (skyblue) tungstens in comparison to pure (green) tungstens.  Arczone makes claims of it being -the best- tungsten with a guarantee, not only that but it's also cheaper than zirconiated tungstens so I wonder which is really superior for this sort of application.  Green is by far the cheapest tungsten, but the other two are supposed to perform -much- better in terms of longevity and arc stability (very important).  What do you guys think?Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands.  If you want to know why, click here.Buy American or bye America.
Reply:I use mostly ceriated tungstens as their good for alum, and various steels.
Reply:Pure, or Green has, for a long time, been best for AC current transfer.  I know that some Mfg. say theirs is the best, but what else can they say.  JGSMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:Originally Posted by weldgaultPure, or Green has, for a long time, been best for AC current transfer.  I know that some Mfg. say theirs is the best, but what else can they say.  JG
Reply:I have used both pure and zirconiated on my transformer machine.  I prefer the pure (green) because I feel it gives a smoother arc.  Pure is also cheaper than zirconiated although it doesn't last as long.Linde/Union Carbide HDA-300Hobart RC-250Lincoln AC-225Lincoln WeldPak 100 Hobart Stickmate LX Victor OxyAcetylene