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http://paper.lib.uiowa.edu/index.phpDas Forschungsprojekt untersuchte Papiere des 14.-19. Jahrhunderts, ohne sie zu beschädigen.In the fall of 2010, we completed a new analysis of 1,578 papers using only nondestructive techniques. Book, manuscript, and printmaking papers made between the fourteenth and the nineteenth centuries were tested using XRF (X-ray fluorescence) and UV-Vis-NIR (ultraviolet-visible-near-infrared) spectrometers. For each specimen, we gathered data on gelatin and alum concentration; calcium (Ca) and iron (Fe) concentration (in whatever form they appeared, such as oxides, salts, or metal fragments); color; sheet dimensions and thickness; paper strength; publication (date, title, author, country, etc.); and quality of materials and workmanship.Auf http://paper.lib.uiowa.edu/testing.php gibt es jeweils eine Abbildung aus den untersuchten Handschriften und Drucken.