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Lie-flat binding

Lie-flat binding — coil, spiral or wire-o — threads the pages onto a coil through punched holes so the book opens completely flat or folds back on itself.

Also called: Coil binding · Spiral binding · Wire-O

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By the Infinite Library editorial team · Last updated

What it means

A lie-flat binding is any binding that lets the open book rest flat on a table without being held. In print on demand the term almost always means coil binding (also spiral binding): the pages and cover are punched along the spine edge and a continuous plastic coil is threaded through the holes. Wire-O does the same with a double-loop metal wire and a squarer look. Both open 360°, so the book can fold back to a single page.

That is why cookbooks, workbooks, planners, manuals and sheet music are coil bound: the hands are busy and the book must stay open. The trade-offs are a spine with no printable text, a less "bookish" look, and page counts limited by coil diameter — commonly from a few pages up to around 470.

Not every "lay-flat" product is coil. Lay-flat photo books use hinged, board-mounted pages, and Smyth-sewn hardcovers open flatter than glued ones without any coil.

In Bindery

Bindery’s coil-bound lie-flat preset holds 2–470 pages at 8.5 × 11 in, printed on demand by Lulu — the binding behind its recipe-book, workbook and planner formats.

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