I've had a pack of that "Sunography" cyanotype paper for forever, and yesterday I thought I'd give it a shot for the first time. I converted one of my digital pics to B&W, inverted, and played with the colours a bit until I thought it looked alright, then printed it out on a transparency sheet. I took it outside and taped the transparency over the sheet (both on top of a hardcover book for stability) and left it out for 15 minutes—the first 10 of that was a bit overcast; the last 5 the sun was out and shining bright. I poured water on it and left it to dry...and the picture never really appeared. The transparency image: Front (in the bottom right corner you can see what might be the dark part of the buildings, but that's it): Back (which was not printed on): Does anyone know where I most likely went wrong so I can do better on the next run? I figure I just used too much water to finish it, but it may also have been a factor that the transparency didn't have enough contrast, or that parts of the transparency were a bit looser over the paper (because I didn't put glass on top to keep it even). I'm also a little curious about why the back came out the way it did, given that it got no sun until I finished it—shouldn't that have made it uniform?