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<p>“White” papers in artworks show a wide range of hues, which often provide insight into their condition and past exposures. We seek to explain color changes in fine art papers, drawing on analytical data obtained from laboratory papers with known compositions and selected test prints. We use color measurements as well as—for laboratory papers—analysis of iron ion content, molar mass, and carbonyl groups. Laboratory papers, which primarily contained iron ions or gelatin sizing, exhibited the most clearly distinguishable changes, corresponding to typical color changes seen in naturally aged papers. Our data support the existence of typical radiation and post-irradiation effects in such paper and, furthermore, more light-induced damage on recto sides than on unexposed verso sides. Our findings can aid in the characterization of color changes in papers from historical artworks caused by iron or gelatin content.</p>

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White lignin-free papers and their response to light: from research to conservation practice

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月23日

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  • Fabienne Meyer,
  • Irene Brückle,
  • Ute Henniges,
  • Jana Müller,
  • Hajar Khaliliyan

摘要

“White” papers in artworks show a wide range of hues, which often provide insight into their condition and past exposures. We seek to explain color changes in fine art papers, drawing on analytical data obtained from laboratory papers with known compositions and selected test prints. We use color measurements as well as—for laboratory papers—analysis of iron ion content, molar mass, and carbonyl groups. Laboratory papers, which primarily contained iron ions or gelatin sizing, exhibited the most clearly distinguishable changes, corresponding to typical color changes seen in naturally aged papers. Our data support the existence of typical radiation and post-irradiation effects in such paper and, furthermore, more light-induced damage on recto sides than on unexposed verso sides. Our findings can aid in the characterization of color changes in papers from historical artworks caused by iron or gelatin content.