
Saddle Stitching
In saddle stitchingthe way most booklets, magazines, catalogs, calendars, and many other printed documents are boundwire staples hold the piece together. A machine drives them through its backbone fold to the centerfold, where they clench. A saddle-stitched printed piece lies almost flat when opened, a convenience for readers.
However, saddle stitching involves certain mechanical requirements. A saddle-stitched document must be at least eight pages long and increase in length in four-page increments. Saddle stitching is a good choice for binding documents of up to 64-80 pages on 60# to 70# paper. Documents involving more pages, or thicker than 3/8", demand some other type of binding.
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Perfect Binding
To produce a perfect-bound (also known as adhesive) document, the pieces folded signatures are gathered together in page sequence, clamped together, and placed in a machine that slices about1/8" off their left edges. Then roughers mill the newly sliced sheet edges to prepare them for gluing. Finally, the edges receive an adhesive application and adhere to a backing.
Perfect binding is well suited for use with books and thick magazines, annual reports, technical manuals, and catalogs. From a minimum thickness of 1/8", it works well with a wide range of document thicknesses and trim sizes. However, the paper used should not be heavier than 100# Book stock, with the grain running parallel to the pieces spine.
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