Poison found in Ancient Books

If books could kill … scientists in Denmark have found high levels of arsenic in three books from the 16th and 17th centuries. “We were looking for writing which shows up as ink may contain copper or iron or calcium, however, the moment we put the X-ray beam on the green surface we saw the fantastic high amounts of arsenic.”

Scientists used micro X-ray fluorescence technology, which is widely used to analyze the chemical properties of pottery and paintings. This analysis revealed that the green pigment on the books’ covers is arsenic.

Source: Deadly discovery: Poisonous books found in university library