a book with signatures which have never been cut as opposed to untrimmed and uncut. Unopened books retain the folds of the original gathering and contain many pages which cannot be read without first cutting the pages open.
A term applicable to any book that contains signatures, which have never been cut. Unlike an untrimmed book, which contains pages having uneven edges, an unopened book still has the folds of the original gathering. Many of its pages cannot be read unless they are first cut open with a knife or scissors. An unopened book is particularly attractive to some collectors, who prefer that it to never have been read. See also SIGNATURE TRIM UNCUT
Newspapers of eight pages were printed on one huge sheet which was folded twice, by hand or machine. They were then delivered, with the tops of the pages still joined where folded, to patrons who cut, or opened , them with knives. often elaborately designed for the purpose. Occasionally papers turn up which have not been cut along the tops of the pages, and are still "unopened" as printed. The term does not mean that no one has ever looked inside the paper, as some incredulous novices seem to think.