Thanks, Coyotemax, for highlighting this technique. This floated into my brain once or twice while I was drinking my morning tea, then disappeared again. Your awesome results made me want to try this out, just before I tossed out the dregs Just thought I'd attach the results, if they could be of use to anyone, though they are not as gorgeous as yours. The drying was rough and ready by putting the paper on the radiator but it did crumple somewhat interestingly.
This was done in a hurry, as just an experiment - actually, I had two papers but I put them out on the balcony to dry, and one went 'gone with the wind' so to speak. Oh well - note to self, don't put anything out in the autumn wind without weighting them down first