{"id":3734,"date":"2015-06-22T12:20:20","date_gmt":"2015-06-22T16:20:20","guid":{"rendered":"https:\/\/engineering.jhu.edu\/magazine-archive\/?p=3734"},"modified":"2015-07-01T14:09:15","modified_gmt":"2015-07-01T18:09:15","slug":"one-for-the-papers","status":"publish","type":"post","link":"https:\/\/engineering.jhu.edu\/magazine-archive\/2015\/06\/one-for-the-papers\/","title":{"rendered":"One for the Papers"},"content":{"rendered":"

\"final<\/a>When historic Homewood Museum was considering re-wallpapering its drawing room, its conservators turned to a purchased fragment of late 18th-century French wallpaper. The paper would have been made for elegant interior decoration around the same time that Homewood\u2014the original estate of Charles Carroll Jr., which later became the site of the Homewood campus\u2014was constructed in 1801.<\/p>\n

However, says director and curator Catherine Rogers Arthur, everyone was in for a surprise when the fragment was removed from its frame by the Sheridan Libraries Department of Conservation and Preservation. Underneath a surrounding border, the wallpaper\u2019s background was light blue, a dramatic difference from the creamy white present in the rest of the fragment that had been exposed to light and air.<\/p>\n

\u201cWe\u2019re always looking for an opportunity to use Homewood as a learning lab for students,\u201d says Arthur. Seeing the wallpaper\u2019s color discrepancies as a potential student project, she turned to Whiting School Associate Research Professor Patricia McGuiggan, who teaches a class called Materials Characterization. The first half of the semester teaches students different techniques used to analyze various materials, including historical ones. In the class\u2019s second half, students put these techniques to good use in projects with real-world materials.<\/p>\n

\u201cThese are difficult problems, because students aren\u2019t given pristine samples,\u201d McGuiggan explains. \u201cIt\u2019s always a puzzle.\u201d<\/p>\n

Because there were two popular blue paints at the time with dramatically different chemical compositions and properties\u2014Prussian blue and ultramarine\u2014McGuiggan tasked students Melanie Shimano \u201914, Lucy Oh \u201917, and Yu Jung Shin \u201917, with figuring out which paint actually composed the wallpaper\u2019s mysterious background color.<\/p>\n

The team used six different analytical techniques over the course of several weeks. Eventually, the students concluded that the background paint was ultramarine, providing more realistic information for conservators to reconstruct this wallpaper and to conserve the original fragment for the future.<\/p>\n

\u201cThe goal for me is to think of Homewood as a research subject on which to impose the scientific method,\u201d says Arthur. \u201cStudents are an important part of the research team.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

When historic Homewood Museum was considering re-wallpapering its drawing room, its conservators turned to a purchased fragment of late 18th-century French wallpaper. 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