• Paper Lab
  • 264 South 23rd Street  
  • Philadelphia, PA 19103
P 215.545.0613
F 215.735.9313


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Paper Conservators

Our Paper Conservators have treated numerous types of paper, from parchment to maps. They even treat paper across dimensions--some favorite objects include three-dimensional works like globes and paper boxes. 

  • Tessa Gadomski

Tessa Gadomski

Book & Paper Conservator

Tessa earned her MS in Art Conservation from the Winterthur/University of Delaware Program in Art Conservation.  Along with this degree, she received a Certificate of Advanced Study in Preservation from Simmons College, Graduate School of Library and Information Science. She also holds a BA in Art Conservation and Art History from University of Delaware. Before joining CCAHA, Tessa was as a Kress Fellow at Dartmouth College Library, where she helped to assess and treat a diverse collection of printed and photographic materials. Tessa has interned at the Library of Congress, the Smithsonian Institution Archives, and Harvard’s Weissman Preservation Center. Prior to graduate school, she spent two years as a conservation technician at Heugh-Edmondson Conservation Services LLC.

As a Book & Paper Conservator, Tessa meets with clients, writes reports, and treats a wide range of objects, from printed materials to parchment.

  • Heather Hendry

Heather Hendry 

Paper Conservator

Heather received a Master’s in Art Conservation, specializing in paper conservation, from Queen’s University in 2000. She completed conservation internships at the Canadian Centre for Architecture and the National Gallery of Canada. She also worked as a paper conservator at the Canadian Conservation Institute, the Yale Center for British Art, and Harvard University Libraries’ Weissman Preservation Center. Prior to joining the staff of CCAHA in 2015, Heather maintained a private practice outside of Philadelphia for five years.

As a Paper Conservator, Heather meets with clients, writes reports, and treats a wide range of objects, from printed materials to parchment.


  • Mary Schobert 2017

Mary Schobert

Director of Conservation

Mary Schobert received her MFA in painting in 1981 from Southern Illinois University. She started at CCAHA as a technician in 1982, and completed an apprenticeship there in 1987. In 1990 and 1991, Mary received a Kress Fellowship to study the conservation of photographic materials with Debbie Hess Norris of the University of Delaware/Winterthur Museum. 

While at CCAHA, Mary has been responsible for major treatment projects including the Dutch Colonial Manuscripts of the New York State Archives, William Rau’s oversize albumen prints comprising Pennsylvania Railroad Scenery, a complete set of John James Audubon’s Birds of America, and the Pennsylvania State Archives’ Civil War Muster Rolls. Treatment projects for the Pennsylvania academy of Fine Arts include Thomas Eakins photographs for Thomas Eakins: American Realist, and works by Benjamin West, William Trost Richards, Arthur Dove, and many others for American Watercolors. She has worked with the National Park Service, Southeast Region to manage cellulose nitrate negatives in their collections by training staff, surveying collections, and producing a manual for parks.

She has surveyed numerous collections, including the Archives at the National Independence Historic Park, the United States Naval Academy, Great Smoky Mountains National Park, and the Free Library of Philadelphia. Mary has supervised training of interns and fellows at CCAHA since 1997 and is a professional associate member of the American Institute for Conservation, Book and Paper Group and Photographic Materials Group.

Read our 2005 interview with Mary here.

  • Jessica Silverman 2

Jessica Silverman

Senior Paper Conservator & Preservation Consultant

Jessica Silverman holds a MS in Art Conservation from the Winterthur/University of Delaware Program.  She received her BA in Art History, with a minor in Chemistry and a certificate in Museum Studies, from the University of Illinois at Chicago. Prior to her work at CCAHA, Jessica interned in conservation labs at the American Philosophical Society; the Walters Art Museum; the Rijksmuseum (Amsterdam, Netherlands); the Winterthur Museum in Delaware; the Art Institute of Chicago; and at private paper conservation labs in Chicago.

Jessica completed two years as a post-graduate fellow at CCAHA before joining the staff in 2010. While at CCAHA, she has treated a variety of artifacts, including a 16th-century Persian miniature; William Penn indentures on parchment; Revolutionary War documents; an early-19th century pastel portrait by Micah Williams; a political map signed by Andrew Jackson; 19th-century photographic crayon enlargements; lithographs by Rosenquist, Renoir, and Audubon; French Art Nouveau posters; architectural drawings by Louis Kahn; and watercolors by Mary Louise Baker, Andrew Wyeth, and other 20th-century artists.

In addition to carrying out treatments, Jessica works with CCAHA's Preservation Services Department, conducting preservation and vulnerability assessments for museums and archives throughout the country and writing disaster preparedness plans and preservation plans. She also presents preservation workshops to local professionals.

Read our 2016 interview with Jessica here.