[alt-photo] Another quick question - paper negatives

[Henry Rattle]

Thinking of trying paper negatives, to see how results differ from my usual
PDN'd transparencies. I have a problem in that all the plain paper I can lay
my hands on contains brighteners which fluoresce under UV light and
effectively render the paper opaque to UV.

What kind of paper do people use for paper negs?

Best wishes

Henry