Paintings conservators consider paintings as layered structures. Identification and characterization of all the component layers of a painting is the essence of the examination process. This analysis informs treatment possibilities and is critical to the work’s long-term preservation.
Fascinating details of a painting's history and provenance may be found on the reverse side. Examples include incised marks on wood panels, labels, and inscriptions that may include signatures, dates and artwork titles. These details must be protected as they contribute context and value. [...]