This is one of those projects I saw on pinterest and wanted to try ever since - you need paper that is sensitive to light, and sunshine, and then you get some magical results. Basically, working with it is a mixture of art and a really neat science experiment, so, what´s not to like?
I had little trouble finding the paper in Germany - much less than I expected - searching for solar-papier on amazon go me quick and very affordable results.
The paper came, delivered in dark plastic:
It is not super sensitive - you don´t need complete dark to work with it. I had my kids find the stuff they wanted to place on it before, so it wouldn´t have to be exposed too long, but you don´t have to hurry placing the leaves or toys or whatever you take on the paper - if you do it inside.
We worked in the kitchen, placing the sheets of paper on a frame we used instead of a tray, so we could carry them out to the balcony into the sunlight.
I think my favourite is Miro´s playmobil artwork:
When you start, the paper is all blue, but after some minutes out in the sun, it turns completely white - except, of course, for the parts covered with stuff. One trouble though is wind - leaves or lace are swiftly blown away, so you get no proper print. I´ve read about covering the paper with glass, but I didn´t have one at hand, so... we just tried shielding our paper from wind the best we could.
Sometimes more, sometimes less succesfull.
As soon as your paper is completely white, you can rinse it in clear cold water.
The image will first dissolve, and later, when it´s dry, reappear. Really cool :)
Right now, these prints are still hanging from our ceiling, looking awesome, but I could totally see fragments of them used on greeting cards or in mixed media art pieces. And we´ve still got some paper left :)
If you haven´t seen this perfect video, do yourself the favour of watching it, at least to the point when the clothes start raining - it will make you happy for the rest of the day :)