The article discusses the challenges associated with laser cleaning of stained glass surfaces in cultural heritage conservation. Stained glass windows hold significant cultural value but are prone to damage from various factors. The study explores the use of short-pulse lasers, specifically femtosecond laser systems, for safe and controlled cleaning of stained glass.
Different laser frequencies and pulse energies were tested to manage heat accumulation and prevent chemical damage during the cleaning process. The research aimed to develop cleaning protocols that would avoid mechanical and chemical harm to the glass surfaces, ensuring effective restoration and conservation of historical stained glass artifacts.
The experiments involved using an 800 picosecond near-IR laser and a femtosecond laser system to clean glass surfaces. The study found that controlling heat accumulation during the cleaning process was crucial to prevent thermal stresses that could damage the underlying glass surface.
Protocols were proposed to limit heat accumulation, especially when using laser systems operating at high frequencies. For frequencies lower than 20 kHz, treatments were found to be sufficient for safe cleaning of the glass. The research also highlighted the importance of considering optical damage when using UV laser radiation for cleaning stained glass.
Overall, the study aimed to establish effective cleaning procedures that could be applied to historical stained glass windows, contributing to their preservation and long-term conservation.
