London, March 11 (ANI): Italian researchers have found that the 16th century renaissance artist Caravaggio used an early form of photography to project images of his subjects onto a canvas, more than 200 years before the invention of the camera.

According to a report in the Telegraph, the 16th century master used modern darkroom techniques to create his masterpieces, using a noxious concoction of crushed fireflies and white lead.

Italian researchers claim the technique explained why many of his subjects were left-handed the image projected onto the canvas had been reversed.

Art historian Roberta Lapucci said that Caravaggios dramatic chiaroscuro” style of light and shadow was based on a whole set of techniques that are the basis of photography.

Art history scholars have long known that Caravaggio worked in a sort of darkroom, illuminating his subjects through a hole in the ceiling and projecting the image onto a canvas using a lens and a mirror.

But, Lapucci is the first researcher to suggest that he treated the canvas with light-sensitive substances, including a luminescent powder made from crushed fireflies, in order to fix the image as 19th century photographers later would.

He then used white lead mixed with chemicals such as mercury, to outline the image in greater clarity, believes Lapucci.

Lapucci, who teaches at an arts institute in Florence, based her hypothesis on research by British artist David Hockney, who wrote in his 2001 book Secret Knowledge that many old masters used optical instruments to compose their paintings.

There is lots of proof, notably the fact that Caravaggio never made preliminary sketches, said Lapucci.

An abnormal number of Caravaggios subjects are left-handed. That could be explained by the fact that the image projected on the canvas was backwards, she said.

According to Dr John Spike, a Caravaggio expert based in Florence, to prove the thesis that the Baroque master used chemicals to fix projected images, the paint in the pictures would have to be subjected to laboratory testing.

We know that he worked in a dark room and that he was fascinated by mirrors, and he was living in Rome at a time when it was a hotbed of scientific inquiry, he said.

Might he have used this technique? Its possible his protector, Cardinal Del Monte, was also the protector of Galileo, and they were all fascinated by optics and the new physics, he added. (ANI)