# Integrating Analytical Tools in Treatment Decision-making for Verdigris Corrosion

The ongoing technical study and conservation of an important 1513 hand-colored, printed edition of Ptolemy's Geographia at the Library of Congress has posed interesting challenges, especially in terms of the treatment of select maps that are in poor condition due to the presence of verdigris pigment on a poor quality paper, as well as a later restoration treatment. The speakers highlight the results of quantitative x-ray fluorescence (XRF) trace element analysis before, during, and after treatment of several maps, and discuss how this method of analysis has served as a key aid in the treatment decision-making process.

- Kind: Talk
- Year: 2013
- By: Library Of Congress
- Genres: Education, Science
- Archive: [Library of Congress](https://www.loc.gov/item/2021689162/)
- Licence or status: Rights statement at the Library of Congress (as the archive states it)
- Credit: Library of Congress
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/loc/2021689162?play=1)