Landeiro, DanielaBarreiros, Maria AlexandraManso, M.2026-03-162026-03-162025-05Landeiro, D., Barreiros, M.A., & Manso, M. (2025). Patinas on silverwork: Analytical approach for distinguishing intentionally and naturally corroded surfaces. In: TECHNART 2025: International Conference on Analytical Techniques for Heritage Studies and Conservation, Perugia, Italy, 6-9 May, 2025.http://hdl.handle.net/10400.9/6312ABSTRACT: The patination of silverwork to modify surface color and finish became increasingly popular in 19th-century Europe, particularly among renowned artists such as René Lalique (1860-1945), Henri Vever (1854–1942), and Georges Fouquet (1862–1957). This decorative technique is typically achieved using sulfur-based solutions, resulting in blackish or bluish silver sulfide patinas¹. Patinated silver surfaces often exhibit a characteristic glossy finish, while environmental degradation typically results in a dull, matte appearance, creating visually heterogeneous surfaces that require conservation actions (Fig. 1). However, the chemical similarity between artificial patinas and naturally formed corrosion layers presents a significant challenge - Selecting a cleaning approach that effectively removes the natural corrosion without damaging the original decorative surface².engMaterialsSilver alloyDecorative surfaceCultural heritageColorimetryconference object