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      X-ray imaging of The Night Watch reveals previously unknown lead layer

      news.movim.eu / ArsTechnica · Friday, 15 December - 19:00 · 1 minute

    The Nightwatch, or Militia Company of District II under the Command of Captain Frans Banninck Cocq (1642)

    Enlarge / Rembrandt's The Night Watch underwent many chemical and mechanical alterations over the last 400 years. (credit: Public domain)

    Rembrandt's The Night Watch , painted in 1642, is the Dutch master's largest surviving painting, known particularly for its exquisite use of light and shadow. A new X-ray imaging analysis of the masterpiece has revealed an unexpected lead layer, perhaps applied as a protective measure while preparing the canvas, according to a new paper published in the journal Science Advances. The work was part of the Rijksmuseum's ongoing Operation Night Watch , the largest multidisciplinary research and conservation project for Rembrandt's famous painting, devoted to its long-term preservation.

    The famous scene depicted in The Night Watch —officially called Militia Company of District II under the Command of Captain Frans Banninck Cocq —was not meant to have taken place at night. Rather, the dark appearance is the result of the accumulation of dirt and varnish over four centuries, as the painting was subject to various kinds of chemical and mechanical alterations.

    For instance, in 1715, The Night Watch was moved to Amsterdam’s City Hall (now the Royal Palace on Dam Square). It was too large for the new location, so the painting was trimmed on all four sides, and the trimmed pieces were never found (although in 2021 , AI was used to re-create the original full painting). The objective of Operation Night Watch is to employ a wide variety of imaging and analytical techniques to better understand the materials Rembrandt used to create his masterpiece and how those materials have changed over time.

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      Scientists identify rare lead compounds in Rembrandt’s The Night Watch

      news.movim.eu / ArsTechnica · Monday, 23 January, 2023 - 18:41 · 1 minute

    The Night Watch, Rembrandt van Rijn, 1642

    Enlarge / Scientists and conservators are working together to preserve The Night Watch , by Rembrandt van Rijn (1642), for future generations. (credit: Rijskmuseum Amsterdam)

    One of the most famous paintings from the Dutch Golden Age is Rembrandt van Rijn 's 1642 masterpiece The Night Watch . An interdisciplinary team of researchers has conducted a fresh, in-depth analysis and found rare traces of a compound called lead formate in the painting, according to a recent paper published in the journal Angewandte Chemie. The work was part of the Rijksmuseum's Operation Night Watch , the largest multidisciplinary research and conservation project yet undertaken for Rembrandt's famous painting, devoted to its long-term preservation.

    “In Operation Night Watch we focus on Rembrandt’s painting technique, the condition of the painting, and how we can best preserve it for future generations," said Katrien Keune , head of science at Rijksmuseum and professor at the University of Amsterdam (the Netherlands). "The lead formate gives us valuable new clues about the possible use of lead-based oil paint by Rembrandt and the potential impact of oil-based varnishes from past conservation treatments, and the complex chemistry of historic oil paintings.”

    Science has become a valuable tool for art conservationists, especially various X-ray imaging methods. For instance, back in 2019, we reported on how many of the oil paintings at the Georgia O'Keeffe Museum in Santa Fe, New Mexico, had been developing tiny, pin-sized blisters, almost like acne, for decades. Conservationists and scholars initially assumed the blemishes were grains of sand trapped in the paint. Chemists concluded that the blisters are actually metal carboxylate soaps, the result of a chemical reaction between metal ions in the lead and zinc pigments and fatty acids in the binding medium used in the paint. The soaps start to clump together to form the blisters and migrate through the paint film.

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