> you have to carefully unroll the leaves by hand Don't do that. I assume that the curl problem can be solved processing the leaves into two (non-reactive) met

> you have to carefully unroll the leaves by hand Don't do that. I assume that the curl problem can be solved processing the leaves into two (non-reactive) metallic mesh pieces or two glass panes joined together with a few clothes pegs. Or use pre-dried pressed leaves that are more rigid. Pros: The procedure is faster than the 'macerate it in water for weeks' system plus saving bleaching final step, but (cons) 1) the results are not so good as in the classic procedure (lots of veins vanished in the Hedera leaves for example, and Platanus leaves are still imperfect) 2) you can not use delicate leaves (it seems that the fresh Ulmus, Urtica and Rosa leaves disappeared totally in the procedure but water still could process those), and 3) is more dangerous. Is a nice explorative project, but is just at the middle of the road at this moment. Can be improved