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Swell (bookbinding)
In bookbinding, swell refers to the increased thickness of a textblock along its spine edge after sewing. Swell is a function of the number of sections Section, Sectioning or Sectioned may refer to: Arts, entertainment and media * Section (music), a complete, but not independent, musical idea * Section (typography), a subdivision, especially of a chapter, in books and documents ** Section sig ... in the book, the kind of paper used, the style of sewing, and the thickness of the sewing thread. Human factors also influence swell, especially the force with which the bookbinder "bones down", or flattens, each section after sewing. Prior to the 15th century, swell in textblocks was accommodated, if at all, by shaping the wooden boards that formed a book's covers. The inner surface of each board would be lightly tapered along the spine edge, so that the removed wood created a space for the thicker paper along the sewn folds. By the 15th century, though, the process of rounding a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bookbinding
Bookbinding is the process of physically assembling a book of codex format from an ordered stack of ''signatures'', sheets of paper folded together into sections that are bound, along one edge, with a thick needle and strong thread. Cheaper, but less permanent, methods for binding books include loose-leaf rings, individual screw-posts (binding posts), twin loop spine coils, plastic spiral coils, and plastic spine combs. For protection, the bound stack of signatures is wrapped in a flexible cover or is attached to stiffened boards. Finally, an attractive cover is placed onto the boards, which includes the publisher's information, and artistic decorations. The trade of binding books is in two parts; (i) stationery binding (vellum binding) for books intended for handwritten entries, such as accounting ledgers, business journals, blank-page books, and guest logbooks, and notebooks, manifold books, day books, diaries, and portfolios. (ii) letterpress printing and binding deals with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Section (bookbinding)
In bookbinding, a section, gathering, or signature is a group of sheets folded in half, to be worked into the binding as a unit. The section is the basic building block of codex bindings. In Western bookbinding, sections are sewn through their folds, with the sewing thread securing each section to the one bound before it. The gatherings can be seen by looking at the top or bottom sides of the book, though cheaper modern books are perfect bound with no gatherings, each sheet glued directly to the binding. The gatherings are sewn together at the spine, done in such a way that two or more stretches of thread are visible along each gathering's innermost fold. In medieval manuscripts, a gathering, or quire, was most often formed of four folded sheets of vellum or parchment, i.e. 8 leaves, 16 sides. The term ''quaternion'' (or sometimes ''quaternum'') designates such a unit. A gathering made of a single folded sheet (i.e. two leaves, four sides) is a ''bifolium'' (plural ''bifolia' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rounding And Backing
Rounding means replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. For example, replacing $ with $, the fraction 312/937 with 1/3, or the expression with . Rounding is often done to obtain a value that is easier to report and communicate than the original. Rounding can also be important to avoid misleadingly precise reporting of a computed number, measurement, or estimate; for example, a quantity that was computed as but is known to be accurate only to within a few hundred units is usually better stated as "about ". On the other hand, rounding of exact numbers will introduce some round-off error in the reported result. Rounding is almost unavoidable when reporting many computations – especially when dividing two numbers in integer or fixed-point arithmetic; when computing mathematical functions such as square roots, logarithms, and sines; or when using a floating-point representation with a fixed number of significant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
