1. Paper Converting and Packaging Technology, Department of Energy and Process Engineering, Tampere University of Technology, P.O. Box 589, FI-33101 Tampere, Finland
2. Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland
3. Laboratory of Paper Coating and Converting, Center for Functional Materials, Abo Akademi University, Porthansgatan 3, FI-20500 Abo/Turku, Finland