*cough cough*

If I may interject...

Those are really beautiful cyanotypes for one. I do know however that Umut is probably looking for something more exotic and esoteric, and of a theoretical vein. Umut is rarely looking for something practicable to do; but is more interested in what's possible in theory. So I think that's the point of view that PE is coming from.

I smelled something getting a little hot and thought I should open a window...

Just my 2