In addition to the sewing, a layer of adhesive is often applied along the spine in order to attach spine linings made of paper, parchment, or textile. Starting in the nineteenth century, it has now become common for these raised bands to be solely cosmetic additions and not to be an indication of the actual sewing structure beneath. Raised cords create a decorative element on the spine in the form of raised bands. One of the benefits of this type of binding is that sewing over cords and tapes provides extra support to the textblock. strips of cloth or vellum) that have been arranged perpendicular to the spine. The sewing is generally done over either cords, thongs made from animal skins, thongs made of plant fibers (raised or recessed), or tapes (e.g. Through-the-fold binding involves sections of pages called signatures, which are arranged and sewn together with thread through holes in the folded edges. Mass market paperbacks are an example of this binding type.ĭouble fan adhesive binding with non-coated paper (inside).ĭouble fan adhesive binding (bottom) compared to oversewn binding (top). While adhesive bindings are generally considered inferior to sewn bindings, they are economical and work well for books that receive heavy use over a short period of time. Since this method does not allow the adhesive to penetrate between the sheets, it provides a less secure bond than double fan adhesive. Perfect binding (or, "thermoset adhesive binding") is a type of binding using a hot melt adhesive applied along the spine to hold the pages of the textblock together.
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