Chemistry of paint.

[Ладик]

Hello!
Looking through the auctions in Europe, drew attention to the color of paint
paintings by Russian artists. In particular, the white color .
It is fresh, as soon as that from the store.
He opened the tube , which more than 20 years , with white paint and color
since zhelteznoy . And the oil turned yellow .
Maybe someone knows. that the great painters
did. to paint on their canvases was fresh and bright.