DC+ vs.DC- penetration for DC+ and DC- rods

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The more I read into this the more I''m getting confused. I always thought that since electrons flowed negative to positive that DC- got better penetration. I have since learned by some sources that DC+ gets better penetration BUT only if the electrode is DC+ only. If a rod is designed to be used with DC+ or - which setting would give the best penetration. I am strictly talking about arc welding rods.Thanks in advance!
Reply:It Depends.......It doesn't matter which way the electrons flow, at least not for me.  6013 is a good example.  It will work DCEN or DCEP.  I find it runs better and leaves a better bead on DCEN.  DCEP will go a little deeper, but that is not the answer.If you want more penetration, turn the heat up!  David Real world weldin.  When I grow up I want to be a tig weldor.
Reply:Yep David said it right. TURN UP DA HEATTrailblazer 302 AirpakDynasty 200 DX  Thermal Dynamics Cutmaster 52 CamoMiller Dailarc 250 OLD But great!!2 Miller 140's w/autoset NEW! Millwauke Cold cut sawsDewalt portabandJd2 notcherPipe beveling machine
Reply:For stick electrodes, penetration depends a lot on the coating. The subject of polarity came up a while ago wrt  TIG welding but got into stick arcs too; you might want to read:http://weldingweb.com/vbb/showthread.php?t=22308