Will do on next one, I do have aluminum foil out in the shop. Hadn't thought of reducing CFH 25%. I don't have a dual regulator unfortunately, so purge is not possible, but daming backside is a good idea.HitMissTom wrote:What I would try (experiment?) is to make some sort of argon dam under the V and apply some purging to it (maybe heavy aluminum foil if the heat can be controlled). Also, the argon cfh should be reduced about 25% on corner and edge welds (probably heard that on a Weldmonger video).
Another thing I just thought of. I had used red dykem layout dye and was not able to get all of it off the metal. So that is probably contributing to contamination.