You can the abstract of the paper here:
Toner-print removal from paper by long and ultrashort pulsed lasers
David Ricardo Leal-Ayala1, J. M. Allwood1,*, M. Schmidt2 and I. Alexeev2
Author Affiliations
1Low Carbon Materials Processing Group, Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
2Lehrstuhl für Photonische Technologien, Paul-Gordan-Straße 3, 91052 Erlangen, Germany
http://rspa.royalsocietypublishing.org/content/early/2012/03/09/rspa.2011.0601.abstract