Acknowledgements
The authors gratefully acknowledge the financial support of
the CPER 2007–2013 “Structuration du Pôle de Compétitivité
Fibres Grand’Est” (Competitiveness Fibre Cluster), through regional
(Région Lorraine), national (DRRT and FNADT) and European
(FEDER) funds. We thank Franck Jolibert (UNGDA) and Franck Le
Net who provided the raw material.