Survey of Historical Manuscripts Written with Iron Gall Inks in the Slovak Republic.

The article discusses the survey on archival manuscripts in Slovakia. Documents from the University Library, Slovak National Archives, both in Bratislava, and Slovak National Library in Martin represented the 170 collection. Corrosion damages, solubility of the materials, and stamps used other than iron gall inks comprised the objectives of the researchers as determined in a criteria. One of the results revealed that 41 percent of the materials arrived at 4.1-5.0 pH value.