Many antiques may carry hidden marks or signatures only discernible under ultraviolet light. Artists and craftsmen often used materials that react to UV light, unknowingly leaving a "secret signature" or detailing that remains invisible in ordinary light. This can provide proof of authenticity or reveal hidden restorations. When exploring the world of antiques, a UV light could unveil a story untold for centuries. Have you ever uncovered a fascinating secret or tale behind an antique? Share your own discovery!