I've read this group for a while and have heard Ernie comment that he mostly uses the 2% Lanthanated tungstens. So I bought a set of 2% 3/32" electrodes from Aglevtech for the TIG class I'm taking and have been happy with them.
Looking at the available electrodes, it seems that they still make 1% and 1.5% lanthanated. What would the advantage be for the lower percentage of lanthana? There is only a dollar or two difference so that probably isn't the reason... Just curious if there are applications where one would want a lower percentage.