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Exploring the Challenges of Glue- Paste Lining in a Humid Environment and the Ethical Considerations of Treatment and Retreatment
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Glue-paste linings—traditionally composed of mixtures like flour and animal glue to attach a
secondary canvas—have long been employed in painting conservation. However, these linings present
significant challenges, including material degradation, invasive application methods, and adverse
effects on the original artwork’s aesthetics and structure. Over time, adhesive brittleness
compromises the painting’s stability, while the lining process can induce mechanical stresses that risk
damaging original canvases and paint layers. Furthermore, chemical interactions between original and
added materials may accelerate deterioration.
This dissertation explores alternative post-lining approaches that prioritize long-term stability,
reversibility, and minimal intervention. Among these, mist-lining—a technique applying adhesive via
a fine mist to create a nap-bond system—offers reduced adhesive use and eliminates the need for
excessive heat and pressure. This method aligns with modern conservation ethics by minimizing
invasiveness and enhancing removability, particularly suited for humid and warm climates.
Two Baroque paintings by Maltese artist Stefano Erardi—Saint Thomas and Saint Andrew—serve as
case studies. In Saint Thomas, despite aesthetic concerns caused by lining seams, the painting’s
stability justified refraining from delining, underscoring a minimalistic, preservation-first ethic.
Conversely, Saint Andrew exhibited significant structural damage due to lining degradation, prompting
removal and replacement with mist-lining. This intervention protected the original paint, repaired
structural issues, and adhered to conservation best practices.
Ultimately, this work demonstrates a shift in conservation from traditional glue-paste linings toward
advanced, ethical techniques that safeguard the authenticity, appearance, and material integrity of
historical artworks. These case studies illustrate how ethical considerations guide tailored
conservation decisions, balancing necessary intervention with the imperative to preserve original
materials and historical authenticity