Now on blog of The New Yorker writer Betsy Morais has weighed in today with "How to Catch an Art Thief When the Evidence Has Been Torched" by quoting a chemist on the type of "screening process" likely to be used to analyzed the charred remains of what may turn out to be the seven paintings stolen from the Triton Foundation while on display at the Kunsthal Rotterdam on October 16, 2012.
Upon arrival at a crime scene, if investigators were to find nothing more than black ash, analyzing any of it would be impossible. “But fortunately, that’s never really the case,” Tague said. “If things are charred, then you can typically identify which artist would have generated the art.”
It’s a delicate process. The eye can only see something as small as seventy-five microns, or about the width of a strand of hair. “You’re looking for particles much smaller than that,” Tague said. “So it’s tedious, really tedious. And you don’t want to disturb a crime scene. So it could take weeks or months just to recover the particles.” Even just two or three microns of dust could be the key to identifying the signature of Picasso.Ms. Morais reported that the director of Romania's Natural History Museum, Ernest Oberlander-Tarnoveanu, 'told me by email that they also found "fragments of paintings with imprints of the canvas".'