Algo que Edvard Munch no consideró para su famosa pintura de El Grito fue conseguir pigmentos de mayor calidad. Un siglo después el público ha ido diluyendo la pintura con su propia respiración.
“It turned out that rather than use pure cadmium sulphide as he should have done, apparently he also used a dirty version, a not very clean version that contained chlorides,” Koen Janssens, a professor at the University of Antwerp who worked on the study, told the Guardian. “I don’t think it was an intentional use–I think he just bought a not very high level of paint. This is 1910 and at that point the chemical industry producing the chemical pigments is there but it doesn’t mean they have the quality control of today.”