aster94:
Could you give me a link or only the brand of this tracing paper?
It's Gateway brand but I don't think there's anything special about it. It was the first one I found in the stationery catalogue we use at work.
It's 90gsm which is just a bit thicker than standard copy/laser paper - I think that makes it a bit easier to handle.
I made my own exposure box using a UV CFL tube from a pond steriliser. It takes a long time to expose (about 15 minutes) but as I said, the results have been good.