Welding Tig means a nice bad sharp Tungsten.
I put my 'needles' in my cordless drill and sharpen them on 80-grit sanding discs. It's important that your 'sparks' are flying away in a straight line on 12 o'clock and avoid a 'sanding curve' that bends away from the center of the Tungsten tip. In that case the grain in the tip grain would steer your plasma (during welding) away and your puddle will be less tight.
