Parts of Vincent van Gogh's "Flowers in a blue vase" painting have mysteriously changed color over time, and now scientists have figured out why: A chemical reaction between the paint and a ...

Certain areas of the painting where Munch used cadmium yellow paint have started to lose color and flake off. To protect the piece, it has been kept in a climate controlled space at the Munch ...

Through a process called oxidation, which occurs naturally over time with exposure to light, the yellow-hued cadmium sulfide is being transformed into cadmium sulfate and cadmium carbonate, both ...

To their credit, pre-1920s manufacturers attempted to heat and stabilize the pigment, but gave up when their efforts went awry. Matisse's cadmium yellow paint resulted from a precipitation process.

The Scream (1893) is Edvard Munch's most renowned work. Public domain via Wikimedia Commons. The vibrant colors of Edvard Munch’s most famous painting, The Scream, have faded with time ...

The cadmium sulfide signal started to wane as early as week one, eventually decreasing by more than 80% by week four. The signal loss is a result of chemical changes in the pigments, Zhou said.

The elements sodium and cadmium will produce yellow light. Most sodium is obtained nowadays by processing the mineral halite, also known as sodium-chloride or common table salt.

The cadmium sulfide signal started to wane as early as week one, eventually decreasing by more than 80% by week four. The signal loss is a result of chemical changes in the pigments, Zhou said.