|
To solve this chemical mystery, French researchers used the powerful X-rays
created by the European Synchrotron Radiation Facility in Grenoble, France.
The synchrotron is often used to more closely study the structure of
materials, and this particular analysis turned up a most unusual reaction.
Sunlight can only penetrate a millionth of a meter into Van Gogh's
paintings, but that's enough to trigger a previously unknown reaction that
transforms the chrome yellow used in the paintings into a dull brownish
color.
|
