Task: Development of a brand book for Conergy, which illustrates the cleantech business segments of the company. Such as solar, wind, biological and geothermal energy. The book should make Conergy appear as a smart, intelligent and highly attractive company.Solution: The book does not need a single drop of ink. Instead the pictures and the text are made up of tiny holes in the paper. The result: a completely white book – the cleanest book on earth.