The case of the vanishing da Vincitags: Leonardo da Vinci
One of Leonardo da Vinci's masterpieces, drawn in red chalk on paper during the early 1500s and widely believed to be a self-portrait, is in extremely poor condition. Centuries of exposure to humid storage conditions or a closed environment has led to widespread and localized yellowing and browning of the paper, which is reducing the contrast between the colors of chalk and paper and substantially diminishing the visibility of the drawing.
A group of researchers from Italy and Poland with expertise in paper degradation mechanisms was tasked with determining whether the degradation process has now slowed with appropriate conservation conditions—or if the aging process is continuing at an unacceptable rate.
comments powered by Disqus
- Shipwreck Found Under World Trade Center Traced Back To Colonial Era Philadelphia
- Bob Dallek in the NYT gives a rave review of John Dean's history of Watergate cover-up
- Ex-President George W. Bush Authors Book About His Father
- Tears, and Anger, as Militants Destroy Iraq City’s Relics
- Europe notes 100th anniversary of World War I
- Why Benny Morris is both right and wrong
- Professor Ilan Pappé: Israel Has Chosen to be a 'Racist Apartheid State'
- History Professor: Convicted Cop Killer Mumia Should Be Celebrated Like Martin Luther King Jr. in Schools
- Robert Drew, Cinema Verite Documentarian, Dies at 90
- Rick Perlstein: “Ronald Reagan absolved America almost in a priestly role not to have to contend with sin. The consequences are all around us today”