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What toxicity did Scheele’s green cause in Victorian interiors?
Scheele’s green, the star pigment of Victorian interiors, concealed a deadly secret: up to 60% arsenic. This elegant poison caused chronic poisoning, mysterious illnesses and deaths in Europe's mos...

Why did Indian Yellow come from cow urine fed with mango leaves?
Indian yellow, a pigment of unparalleled brightness sought after by the greatest masters, hid an astonishing secret: it came from the urine of cows exclusively fed on mango leaves. A mysterious pra...

How Did Renaissance Painters Obtain That Famous Ultramarine Blue?
The deep blue of the Virgin’s robes in Renaissance paintings held a secret: Afghan lapis lazuli, more expensive than gold, transformed by a complex alchemical process. Journey to the heart of the m...

What controversy surrounds the restoration of the Sistine Chapel by Michelangelo?
In 1994, the restoration of the Sistine Chapel revealed vibrant colors that shocked the world. Between revealing Michelangelo's genius and irreversible destruction of original glazes, this controve...

Why Have Some Impressionist Paintings Already Lost Their Original Luster?
Impressionist paintings lose their original luster due to unstable synthetic pigments, prolonged exposure to light, and unsuitable storage conditions. This invisible chemical transformation radical...

How Do Forgers Imitate the Natural Cracking of Old Paintings?
In the secret world of art forgers, reproducing the network of cracks in old paintings represents the ultimate challenge. Between accelerated firing, chemical additives and forced aging, discover t...

Which infrared reflectography technique reveals the preparatory drawings?
Infrared reflectography reveals hidden preliminary sketches beneath ancient masterpieces. This fascinating technique penetrates layers of paint to expose the hesitations, pentimenti and manufacturi...