Art Bites: How Renoir’s Love of Cats Is Enshrined in His Paintings In his later years, the artist would paint with a cat in his lap. Pierre-Auguste Renoir, Julie Manet (1887), Musée d'Orsay, Paris.

Why Did Old Masters Use Eggs in Oil Paintings? A new study explores how artists may have added yolk to alter the properties of their paints. Teresa Nowakowski - Daily Correspondent.

“Old Masters” such as Leonardo da Vinci, Sandro Botticelli and Rembrandt may have used proteins, especially egg yolk, in their oil paintings, according to a new study.

WHEN AN OIL painting is dried and finished, it is supposed to stay that way. Yet when Ida Bronken, an art conservator, began to prepare Jean-Paul Riopelle’s “Composition 1952” for display in ...