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New method to identify inks could help preserve historical documents

Date:
June 18, 2014
Source:
American Chemical Society
Summary:
The inks on historical documents can hold many secrets. Its ingredients can help trace trade routes and help understand a work's historical significance. And knowing how the ink breaks down can help cultural heritage scientists preserve valuable treasures. Researchers report the development of a new, non-destructive method that can identify many types of inks on various papers and other surfaces.

A better way to analyze inks could help preserve treasured historical documents.
Credit: ACS

The inks on historical documents can hold many secrets. Its ingredients can help trace trade routes and help understand a work's historical significance. And knowing how the ink breaks down can help cultural heritage scientists preserve valuable treasures. In a study published in the Journal of the American Chemical Society, researchers report the development of a new, non-destructive method that can identify many types of inks on various papers and other surfaces.

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Richard Van Duyne, Nilam Shah and colleagues explain that the challenge for analyzing inks on historical documents is that there's often very little of it to study. Another complication is that plant- or insect-based inks, as well as some synthetic ones, are composed of organic molecules, which break down easily when exposed to light. Current methods are not very specific or sensitive or can leave a residue on a document. To address these issues, the research team set out to develop a different way to analyze and identify historical inks.

They used the novel method, called tip-enhanced Raman spectroscopy (TERS), to analyze indigo and iron gall inks on freshly dyed rice papers. They also studied ink on a letter written in the 19th century. "This proof-of-concept work confirms the analytical potential of TERS as a new spectroscopic tool for cultural heritage applications that can identify organic colorants in artworks with high sensitivity, high spatial resolution, and minimal invasiveness," say the researchers.

The authors acknowledge funding from the Andrew W. Mellon Foundation, the Grainger Foundation and the National Science Foundation.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Dmitry Kurouski, Stephanie Zaleski, Francesca Casadio, Richard P. Van Duyne, Nilam C. Shah. Tip-Enhanced Raman Spectroscopy (TERS) forin SituIdentification of Indigo and Iron Gall Ink on Paper. Journal of the American Chemical Society, 2014; 136 (24): 8677 DOI: 10.1021/ja5027612

Cite This Page:

American Chemical Society. "New method to identify inks could help preserve historical documents." ScienceDaily. ScienceDaily, 18 June 2014. <www.sciencedaily.com/releases/2014/06/140618122257.htm>.
American Chemical Society. (2014, June 18). New method to identify inks could help preserve historical documents. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2014/06/140618122257.htm
American Chemical Society. "New method to identify inks could help preserve historical documents." ScienceDaily. www.sciencedaily.com/releases/2014/06/140618122257.htm (accessed November 27, 2014).

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