http://en.wikipedia.org/wiki/Check_washing http://en.wikipedia.org/wiki/Check_washing I could see the laser maybe working on ballpoint ink, which AFAIK stays m

http://en.wikipedia.org/wiki/Check_washing http://en.wikipedia.org/wiki/Check_washing I could see the laser maybe working on ballpoint ink, which AFAIK stays more on the surface due to its high viscosity, but I think like check washing techniques, it'd have trouble with the more liquid inks, since the paper absorbs them more readily.