Some weeks ago, Bookbinder Bill Minter published a post about the origins of a particular book project he worked on with Bill Anthony. The post was intended to illuminate a discussion on the use of the concave spine structure, used most famously by James Brockman in the UK. Here Bill traces his own organic development and experience with the structure, an interesting inversion of the conventional and practiced principles of traditional binding technique. Upon request bill furnished us with these pictures, and further added text, which you can also find posted today on the book arts list serv.
You can find the discussion on the book arts list serv. on the archive hosted at the philobiblon website, and more coverage posted earlier on the bonefolder extras blog.
Enjoy.......
In the early 1970s, during my apprenticeship with Bill Anthony, he was telling me about the BOOK OF KELLS, an 8th century Irish manuscript that he had seen during a visit to his homeland. Roger Powell had restored that great Irish national treasure in the 1950s. When this book is exhibited to show the magnificent illuminations, a wooden dowel is inserted under the spine to support the sewing. Bill went on to describe the stress that a binding encounters as a book is opened and how the spine moves from a convex shape to the concave. Then there was the inevitable question: "Why do we force a book to do that?" He further explained the swelling that is created by the sewing thread, and how we, obviously, manage that swelling by rounding a book with the convex shape. We wondered what would happen if the book were bound with the concave-shape "built-in". Obviously, the concave shape is readily seen on many well-used, flat-spine books, such as thick telephone books. 
In order to learn more, we prepared an old discarded textblock by sewing it on linen tapes. After gluing up the spine, we reversed the round to accommodate the swelling, thus producing a concave spine. Since we were thinking that the book should look "normal", we prepared a piece of wood --- #1 pine (without knots) from the local carpenter, as I recall -- to fit the concave shape; the linen tapes were then wrapped around the wood. Then another piece of wood was shaped for a normal spine, but this wood was wider to allow a normal shoulder to accommodate the boards. The binding was quarter-leather with vellum sides --- note here we experimented further by attaching the vellum with contact cement which is certainly not a standard bookbinder's adhesive. The true beauty of the binding was obvious upon opening. The book functioned magnificently with no stress or strain while the pages opened fairly flat and the gutter margin was easily viewed. The binding verged on being absolutely perfect and a dream to behold.
Sadly, Bill died on February 8, 1989. This one and only "reverse-round" binding was then thought to be lost because it was not in Bill's binding collection. Only recently was the book found and it is again part of Bill's collection of historic binding structures now available at the University of Iowa. These and many more historic bindings can be viewed at the University of Iowa website: http://digital.lib.uiowa.edu/binding/index.php
As we know, James Brockman has furthered the development of this interesting and unique structure --- a brief description is available at http://www.hewit.com/skin_deep/?volume=2&article=1#article. The concave spine binding is a structure that deserves further investigation for that special book or perhaps for all books, if that were possible.
Bill Minter




















