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How can conservators reattach flaking paint on a wall painting?

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Inside the ongoing preservation of the Vatican — Art conservation and restoration Learn about the restoration of tiles in St. Peter's Basilica, Vatican City.

To reattach flaking paint on a wall painting, conservators employ consolidation techniques designed to stabilize the surface while ensuring compatibility with the original materials.12

A common and effective method involves the hypodermic injection of adhesives. In this process, a conservator carefully injects a suitable natural or synthetic adhesive beneath the detached paint layer. Once the adhesive is applied, the area is typically subjected to light pressure while it dries to ensure the paint layer is firmly fixed back to the wall support.12

When selecting these materials, it is essential that the chosen adhesives or inorganic consolidants are compatible with the painting's original medium. Conservators must exercise discretion to avoid creating film-forming blockages that could trap moisture, as this can lead to further damage such as delamination or salt-related decay. These modern consolidation techniques are part of a broader effort to perform treatments in situ whenever possible, prioritizing the preservation of the original building fabric and the site-specific context of the artwork.1