Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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optical spacing

1. The spacing of the raised bands on the spine of a book in such a manner that the bottom panel is slightly larger (the amount depending on the size of the book) than the other panels, so as to give the spine a balanced appearance. If the bands were so spaced that all of the panels were in fact the same size, the lowest (bottom) panel would appear to be much smaller. The bottom panel usually has the date, or extra (and different) tooling of some nature, at the very tail of the spine, and the size of the panel above this tooling is the same as the panels above it. 2. The spacing of the lettering on the spine of a book in such a manner as to make all of the letters of a word appear as though they are the same distance apart. In the combinations OO, OL and NN, for example, the OO combination would be spaced closer together than the OL, which in turn would be closer together than the NN, in the relative distance of 1 to 1 1/2 to 2 spaces. optimum binding method. An expression some times applied to the method used to secure the leaves or sections of a book, e.g., fold sewing, oversewing, adhesive binding, side sewing, etc., which will offer the best (optimum) binding for a given book in terms of usability, including openability and durability (strength and longevity). It is conceded that there is no one method which can satisfy all requirements for all books.

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Timestamp: Saturday, 19-Nov-2011 13:18:43 PST
Retrieved: Monday, 20-Nov-2017 19:08:24 GMT