背せ丁ちょう

noun

signature; print signature

Technical term in bookbinding and printing: a mark or letter printed on the spine fold of a section (signature) to guide collating and binding.

• 製せい本ほん作さ業ぎょうでは、背せ丁ちょうを確かく認にんしながら折おり丁ちょうを重かさねていく。