[U-238]

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

[TXnMA]

My first patent dealt with laser ablation (of silicon). Specifically, it was a method of dealing with the ablated silicon to keep it from falling back as slag and contaminating the surface.

If this process were done in economically significant volume, dealing with the vaporized polymer binder would be an issue (at least in the building where the process was performed).

Simply performing the ablation in a suitably oxygen-enriched environment would dispose of the polymer (and carbon pigment) -- and provide a smidgen of that good old carbon dioxide that green plants need to thrive.

And, as I said previously, don't give me any "AGW" BS. The feedback has been empirically shown to be negative. (The warmists' computer models -- which all use positive feedback -- are junk...)