<http://schema.org/about>
"A laser printer isn't really that different from that new Xerox at Sterling Cooper; toner sticks to a charged medium (a selenium drum in the 914) is transferred to the paper and baked on. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/are-laser-printers-as-dangerous-as-smoking-or-as-making-toast.html>