Dimple

A small, localized depression or indentation on a surface, typically shallow and rounded in form. Dimples may occur in a variety of materials—such as paper, canvas, wood, metal, or coatings—and can result from pressure, impact, manufacturing irregularities, or inherent material characteristics. In art conservation, dimples are usually minor distortions but may disrupt surface gloss, texture, or the visual continuity of an artwork. Treatment options vary depending on the substrate and may include controlled humidification, gentle reshaping, or surface consolidation when associated with more complex structural issues.