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Friday, May 17 • 10:00am - 10:30am
(Book and Paper) Use Of Heat and Solvent Set Repair Tissues

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This talk will be presented in conjunction with “Analytical Testing of Heat and Solvent Set Repair Tissues” presented in the Photographic Materials Specialty Session.
Pre-coated heat and solvent set tissue has a long history of use at the Library of Congress (LC) and the National Archives and Records Administration (NARA). It is the preferred method for mending certain types of paper materials due to its transparency, reversibility, and ability to be applied with ease, speed, and consistency. Because it does not require moisture for activation it is useful for mending tracing paper, brittle wood pulp paper, mold-damaged paper, and other water-sensitive items.

In their 2015 AIC presentation, “Heat-Set Tissue: Finding a Practical Solution of Adhesives,” conservators at NARA reported they would continue testing of the Avanse MV-100 and Plextol B500 mixtures. LC and NARA have partnered to extend and improve the testing of those mixtures, as well as other adhesives, namely, Aquazol 200, Aquazol 500, Lascaux 498 HV, Lascaux 303 HV, and mixtures of the Lascaux adhesives with Klucel G and methylcellulose.

This research aimed to identify pre-coated heat and solvent set tissues that successfully passed testing and could be confidently used on a wide variety of paper based materials. The history of conservation adhesives is unfortunately plagued with discontinued products and changing formulas. Finding the correct combination and dilution of adhesives is a tricky balancing act: the adhesives must remain flexible and strong enough to assure good adhesion, yet be readily reversible, not cause blocking, and pass analytical testing. Based on recent research results, both institutions have implemented use of a suite of new and modified adhesive mixtures while discontinuing their use of others.

The speakers will report on the procedures used for preparation of the various adhesive mixtures, the coating of the repair tissues, the reactivation and application of the tissues with ethanol or heat, the tackiness and strength of the prepared tissues, and the visual appearance of the resulting mends. The presentation will include case studies showing practical applications of the tissues that successfully passed analytical testing.

avatar for Katherine Kelly-[PA]

Katherine Kelly-[PA]

Senior Book Conservator, Library of Congress
Katherine Kelly is a Senior Book Conservator at the Library of Congress in Washington, DC. Previously, she has worked at the Smithsonian Institution Libraries, the National Archives, Iowa State University, Harvard University, and Cornell University. She received her MS in Information... Read More →

Lauren M. Varga

Lead Conservator, National Archives & Records Administration
Lauren Varga is a Lead Conservator in the Document Conservation Laboratory at the National Archives & Records Administration. She received a Master of Arts degree and a Certificate of Advanced Study in paper conservation from the Art Conservation Program, Buffalo State College in... Read More →

Friday May 17, 2019 10:00am - 10:30am
Earth Ballroom A Earth Convention Center, Mohegan Sun
  • Track Book and Paper
  • Ticketed Included in Main Registration
  • Authors in Publication Order Katherine Kelly, Dr. Jennifer K. Herrmann, Alisha Chipman, Dr. Andrew R. Davis, Yasmeen Khan, Steven Loew, Katharine Morrison Danzis, Tamara Ohanyan, Lauren Varga, Anne Witty, and Michele H. Youket
  • Abstract ID 18699
  • Tags heat set adhesive,pre-coated tissue