Very early on in photography, they used paper as a negative. And to make a positive print they would sandwich a sheet of sensitised paper below the paper negative, pass light over it and produce a positive print.
I thought I would have a go and used my 5×4 inch camera for this – shooting with a 250mm lens then a 150mm lens. I exposed onto standard multigrade printing paper, giving it a rating of 10 ISO. For a first attempt I was quite impressed. Printing paper isn’t sensitive to blue light, so the pictures are quite pale, but its still a success for me and something else I’ve tried and learnt from.