The “Mona Lisa” has given up one other secret.
Utilizing X-rays to see into the chemical construction of a tiny speck of the celebrated murals, scientists have gained new perception into the strategies that Leonardo da Vinci used to color his groundbreaking portrait of the lady with the exquisitely enigmatic smile.
The analysis, revealed Wednesday within the Journal of the American Chemical Society, means that the famously curious, discovered, and ingenious Italian Renaissance grasp could have been in a very experimental temper when he set to work on the “Mona Lisa” early within the sixteenth century.
The oil-paint recipe that Leonardo used as his base layer to organize the panel of poplar wooden seems to have been totally different for the “Mona Lisa,” with its personal distinctive chemical signature, the workforce of scientists and artwork historians in France and Britain found.
“He was somebody who beloved to experiment, and every of his work is totally totally different technically,” stated Victor Gonzalez, the examine’s lead creator and a chemist at France’s high analysis physique, the CNRS. Gonzalez has studied the chemical compositions of dozens of works by Leonardo, Rembrandt and different artists.
“On this case, it’s fascinating to see that certainly there’s a particular method for the bottom layer of ‘Mona Lisa,’” he stated in an interview with The Related Press.
Particularly, the researchers discovered a uncommon compound, plumbonacrite, in Leonardo’s first layer of paint. The invention, Gonzalez stated, confirmed for the primary time what artwork historians had beforehand solely hypothesized: that Leonardo most certainly used lead oxide powder to thicken and assist dry his paint as he started engaged on the portrait that now stares out from behind protecting glass within the Louvre Museum in Paris.
One in all many secrets and techniques
Carmen Bambach, a specialist in Italian artwork and curator at New York’s Metropolitan Museum of Artwork, who was not concerned within the examine, known as the analysis “very thrilling” and stated any scientifically confirmed new insights into Leonardo’s portray strategies are “extraordinarily necessary information for the artwork world and our bigger international society.”
Discovering plumbonacrite within the “Mona Lisa” attests “to Leonardo’s spirit of passionate and fixed experimentation as a painter – it’s what renders him timeless and fashionable,” Bambach stated by e mail.
The paint fragment from the bottom layer of the “Mona Lisa” that was analyzed was barely seen to the bare eye, no bigger than the diameter of a human hair, and got here from the highest right-hand fringe of the portray.
The scientists peered into its atomic construction utilizing X-rays in a synchrotron, a big machine that accelerates particles to nearly the pace of sunshine. That allowed them to unravel the speck’s chemical make-up. Plumbonacrite is a byproduct of lead oxide, permitting the researchers to say with extra certainty that Leonardo possible used the powder in his paint recipe.
“Plumbonacrite can be a fingerprint of his recipe,” Gonzalez stated. “It’s the primary time we are able to truly chemically verify it.”
After Leonardo, Dutch grasp Rembrandt could have used an analogous recipe when he was portray within the seventeenth century; Gonzalez and different researchers have beforehand discovered plumbonacrite in his work, too.
“It tells us additionally that these recipes have been handed on for hundreds of years,” Gonzalez stated. “It was an excellent recipe.”
Leonardo is believed to have dissolved lead oxide powder, which has an orange shade, in linseed or walnut oil by heating the combination to make a thicker, faster-drying paste.
“What you’ll receive is an oil that has a really good golden shade,” Gonzalez stated. “It flows extra like honey.”
However the “Mona Lisa” — stated by the Louvre to be a portrait of Lisa Gherardini, the spouse of a Florentine silk service provider — and different works by Leonardo nonetheless have different secrets and techniques to inform.
“There are lots, lots extra issues to find, for positive. We’re barely scratching the floor,” Gonzalez stated. “What we’re saying is just a bit brick extra within the information.”
