Green arc??

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Hi guys!I recently started learning how to weld and have come upon a question i couldn't answer in the "search" area.Today I was repairing a hinge on a "powder river" horse gate.  I noticed that when I was welding I had a green arc.  Because of how it was positioned I couldn't clean it real well and welded thru some paint and rust.  Other "clean" metal I welded wsa the normal orange/yellow color.What would cause this color change?  Paint? rust??As a new welder I am sure I am overy worried, but I wonder what toxins (if any) I am sucking up when something like this happens, and how it effects my body.Thanks,  Greg
Reply:first of all..what were you welding with?  ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:I'm sorry, Flux core Lincoln 3200HD.
Reply:green arc is a combo of the welding mask lens and the arc from fluxcore itself..thats what it looks like... ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Thanks Zapster for the quick reply!!!!From what I recall, the "clean" metal didn't have the green arc, but I could of been mistaken.Thanks again,Greg
Reply:I Had This Problem When I Welded Bome Bicycle Tube That Had Some Aluminum Flakes In The Paint.i Used A Lincoln Pro Core 100 With .030KISS...KEEP IT SAFE STUPID
Reply:Keep your head outta the fumes or hold your breath what you're welding, it's not worth sucking it in ya.***************************************Lincoln AC225 stick welderLincoln HD100 WeldPak flux core wire feed welderThree of the cheapest grinders money can buy
Reply:Yup, don't suck the fumes.  There's a guy I used to work with I saw last night said he'd been diagnosed with lung cancer and they told him it was from all the years of welding, breathing the dust and fumes.  Sucks.DewayneDixieland WeldingMM350PLincoln 100Some torchesOther misc. tools
Reply:My first flux spool was Lincoln NR-211-MP .030 (E-71T-11) and it seemed to have a blue/green color arc. When I ran out I bought a spool of Blue Demon E-71T-GS (all they had and the last one at that) and that first bright yellow/gold arc surprised me. I stopped, took off the helmet (Lincoln auto) and checked it. I was wondering if it stopped working. The new wire welds nicely but the change in color and brightness surprised me.Warning: I have been wrong before!New small workshop, small MIG, oxyacetylene set with a DHC-2000 that I'm learning to use and really like. Life is good!Typos are there for those that look for them. I try to do something for everybody.
Reply:the green color is coming from the vaporization of copper.  when copper burns it  is blueish green. at least it was when i was in chemistry a life time ago.