Cotte used for ten years a so called reflective light technology, which consists in “projecting a series of intense lights” on to the painting when a camera takes measurements of the lights’ reflections. From those measurement layers of the picture can be reconstituted. This is different of other techniques including infrared inspections and multi-spectral scanning. “We can now analyze exactly what is happening inside the layers of the paint and we can peel like an onion all the layers of the painting. We can reconstruct all the chronology of the creation of the painting,” Pascal Cotte said. If considered, the result of his research could reopen the long been debate about the Mona Lisa’s identity. Officials of the Louvre Museum, who had granted Cotte’s access to the painting in 2004 has declined to comment on his claims because it “was not part of the scientific team”. This is the point where Mr Cotte’s claims became controversial. Some art experts refuse to accept this hypothesis about the famous picture.