Why van Gogh's Sunflowers are wilting

(Deutsches Elektronen-Synchrotron DESY) The colour of Vincent van Gogh's famous Sunflowers is changing over time, because of the mixture of pigments used by the Dutch master. Evidence for the process now comes from a detailed spectroscopic investigation of the Sunflowers version at the Van Gogh Museum in Amsterdam. A group of scientists shone X-rays from DESY's lightsource PETRA III through tiny paint samples taken from the painting. They describe their results in the journal Angewandte Chemie International Edition.
Source: EurekAlert! - Social and Behavioral Science - Category: Global & Universal Source Type: news