With support from the University of Richmond

History News Network puts current events into historical perspective. Subscribe to our newsletter for new perspectives on the ways history continues to resonate in the present. Explore our archive of thousands of original op-eds and curated stories from around the web. Join us to learn more about the past, now.

Scientists attempt to crack Mona Lisa's smile

Leonardo da Vinci's painting technique of using multiple layers of paint and glaze has been examined in an attempt to crack the mystery of Mona Lisa's smile.

French researchers studied seven of Paris's Louvre Museum's Leonardo da Vinci paintings, including the Mona Lisa to analyse his technique that gave his works their dreamy quality.

Specialists from the Center for Research and Restoration of the Museums of France found that da Vinci painted up to 30 layers of paint on his works to meet his standards of subtlety. Added up, all the layers are less than 40 micrometers, or about half the thickness of a human hair, researcher Philippe Walter said.

The technique, called "sfumato," allowed da Vinci to give outlines and contours a hazy quality and create an illusion of depth and shadow. His use of the technique is well-known, but scientific study on it has been limited because tests often required samples from the paintings....
Read entire article at Telegraph (UK)