The newly developed viscose fiber - Leonardo - was designed with a special focus on paper applications and extends the product range of the Bavarian fiber specialists targeted at this market.Leonardo is mainly characterised by its extremely flat cross section. In comparison with other flat viscose fiber specialities, Leonardo has a width to thickness ratio of 40 to 1. At the same time the fiber exhibits an extremely even fiber surface with completely parallel sides and an extremely regular cross section, the company writes in a press release.The new fiber is currently being thoroughly tested in a range of end products. “We follow several interesting projects at the moment,” says Walter Roggenstein, head of R&D at Kelheim Fibres.