A brief statement or emblem detailing the production facts of a publication. It typically lists the typeface, paper stock, ink types, and the names of the printer and binder. Traditionally placed on the final page, it serves as a technical signature for the craftsmen involved, though trade books often merge it into the copyright page at the front.
Heard on the job
Check the colophon to see if they specified the text weight or just the cover stock.
Insider tip
Book designers often use the colophon to showcase their typographic choices, listing the exact fonts and foundries used in the layout.