Last December, the Rare Book and Special Collections Division at The Library of Congress held an excellent symposium on authenticity. “Authenticity,” was a day-long program that looked at one of the most difficult subjects facing libraries, private collectors, and booksellers today -- judging the genuineness of printed materials.  The symposium focused on the research which curators, scholars, and conservators have been conducting regarding all elements of printing and book production.  The speakers included specialists who are at the cutting edge of research on printing techniques, paper manufacture, binding construction, and typography, as well as scholars, conservators, scientists, and booksellers who are dedicated to establishing methods for determining authenticity in the field of rare books, prints, and manuscripts. 

The Library of Congress has released a webcast of the symposium, which you can view below or on their website.