What kind of paper do you use for making stained glass patterns?

If you have the pattern you can transfer to any kind of paper, if you need to trace a pattern use tracing paper and transfer on to heavy weight paper, you can do this a couple of ways, carbon paper or once you have traced your pattern flip it over and use a soft lead pencil and scribble over your traced lines, flip it back over and lay it on your heavy weight paper, tape down and trace again, now you have your pattern on your chosen paper.