Verein für Förderung der thermischen Solarenergie is the Austrian Association for the Production fo Thermal Solar Energy. They wanted to win recognition and to mark people. Their 2011 solar power report has been sent to the members of the organization as well as to business and political contacts. But what everyone notice is that the document reveal its content only when it is exposed to sunlight. It was printed in a special ink that make each page blank without this exposition. The Solar Report has become the only report provided by the sun