{"id":38195,"date":"2026-09-14T13:50:44","date_gmt":"2026-09-14T11:50:44","guid":{"rendered":"https:\/\/antykwariat-polski.pl\/what-is-a-printers-mark-and-a-publishers-mark-in-a-book-small-marks-with-a-big-history\/"},"modified":"2026-09-14T13:50:44","modified_gmt":"2026-09-14T11:50:44","slug":"what-is-a-printers-mark-and-a-publishers-mark-in-a-book-small-marks-with-a-big-history","status":"publish","type":"post","link":"https:\/\/antykwariat-polski.pl\/en\/what-is-a-printers-mark-and-a-publishers-mark-in-a-book-small-marks-with-a-big-history\/","title":{"rendered":"What Are a Printer’s Mark and a Custodian’s Mark in a Book?\u2014Small Marks with a Long History"},"content":{"rendered":"

Photo: Brett Wharton<\/a> \/ Unsplash<\/a><\/em><\/p>\n

Anyone who has ever leafed through an old book\u2014holding it spine-up and flipping through the pages from the back\u2014may have noticed strange letters, numbers, or single words at the bottom of some pages that don\u2019t seem to fit the text. This is neither a printing error nor a coincidence. Understanding what a colophon is and how it differs from a custodian\u2019s mark allows us to view old prints and 19th-century editions in a completely different light\u2014as the result of precise craftsmanship, in which every detail served a specific purpose. <\/p>\n

What is a printer’s mark?<\/h2>\n

A printer’s mark is a designation\u2014usually a letter, a number, or a combination of both\u2014placed at the bottom of the first page of each printed sheet. Before the advent of bookbinding machines that stitch together finished blocks, books were assembled by hand from individual sheets, which, after both sides were printed, were folded into what are known as \u201csignatures.\u201d With larger print runs, the sheets would easily get mixed up or out of order, and the bookbinder had to know the correct sequence in which to arrange them. <\/p>\n

The reference number solved this problem. Subsequent sheets were marked with letters of the alphabet (A, B, C…), and within a single section\u2014additionally with numbers (A2, A3, A4)\u2014which indicated the order of the pages within a given sheet. This allowed the bookbinder to quickly verify that the set of sheets was in the correct order before sewing them into the book block. This technical solution, dating back to the era of incunabula, persisted in European printing for several centuries and is today one of the fundamental elements by which bibliographers and antiquarians identify the layout of a publication and verify its completeness. <\/p>\n

The Curator in the Book\u2014Why Was It Used?<\/h2>\n

The “kustosz” served a similar, though slightly different, function. It is a single word (or the beginning of a word) placed in the lower right corner of a page, repeating the first word of the following page. By typesetting the text in this way, the typesetter left a sort of link between the pages\u2014the printer and proofreader could quickly verify that the pages followed one another in the correct order without having to read the entire text. <\/p>\n

Colophons were particularly popular in 16th- to 18th-century printed works; later, they were gradually phased out as typesetting and quality control processes became more organized. In many old books\u2014especially first editions of Polish texts from the Enlightenment or Romantic periods\u2014the colophon appears consistently on every page, creating a sort of textual chain visible to anyone who turns the pages carefully. <\/p>\n

Printing Markings in Old Books\u2014What Else Is Worth Knowing<\/h2>\n

The colophon and the publisher\u2019s name are the most common, but not the only, printing marks found in old books. When analyzing an antique book or a nineteenth-century edition, one may also encounter: <\/p>\n