Printing on paper using only the sun? The greatest prints are created with this special Sonnendruck paper. To do this, simply place different objects such as leaves, flowers or puzzle pieces on the paper. This is then placed in the sun for some time and then placed in a water bath. It changes color and the print becomes visible.
But how can it be that you can only print with the help of the sun's rays? The paper is coated with ferrous powder on the darker side. Sunlight turns it into a blue dye.
+ 10 Sonnendruck papers in A4 format + including exciting information on the scientific phenomenon "solar pressure" inside the packaging
According to the instructions, the paper should be exposed to the sun for 10 minutes while the draped objects are lying on it. This time specification applies to very sunny days. If it's cloudy, it takes up to 30 minutes. To stop the reaction, put the paper in a bowl of cold water.