One of the positive results which developed frorn the disastrous flood of Florence in 1966 was the author's awareness that so-called limp vellum binding structures, although often badly damaged in their covers, had seemingly not inflicted as much damage to their text blocks as had other binding structures. Over the past eight years the author has been experimenting with this type of structure in order to assess its potential as a conservation technique. Two findings are important. First, limp vellum bindings have the potential of satisfying many conserwation principles, the most interesting of which is that as non-adhesive structures they provide an opportunity for disassembly, maintenance, and reassembly with little or no damage to the text block. Second, some of the techniques may be transferrable to stiff board work, opening new avenues for development of binding techniques. This paper discusses selected aspects of the author's work with limp vellum binding structures. It is drawn from a two-volume study entitled Limp Vellum Binding. Author's address: Administrative Department, Library of Congress, Washington D.C. 20540, USA.