 In contrast, the white lead found in Dutch paintings from 1600–1660 had polonium-210 values of 0.23±0.27 and radium-226 values of 0.40±0.47.In 1977, another investigation was undertaken by the States forensic labs of the Netherlands using up-to-date techniques, including gas chromatography, to formally confirm the origin of six van Meegeren forgeries that had been alleged to be genuine Vermeers, including the "Emmaus" and the "Last Supper".The conclusions of the 1946 commission were again reaffirmed and upheld by the Dutch judicial system.