The content of the report can only be viewed in sunlight.
The solar annual report of a German solar energy provider, Austria Solar was designed by ServicePlan, a Munich-based advertising agency.
ServicePlan said, "We were briefed to develop a remarkable medium, which had to portray Austria Solar as a consistently innovative inter-trade organisation of the Austrian solar industry."
The report was printed using environment-friendly photo chromatic colours which only become visible under UV light and disappear after three minutes without UV exposure. The difficulty was to get a right ratio of colours so as to render the content of the report invisible under artificial light.
The report bagged a Grand Prix in the Design Lions category at Cannes Lions 2012.
The report under artificial light.
The report under sunlight.
Click here to watch the video on the Austria Solar
