Trindle. A small tool used to take out the round of a book when it is being cut.
Tub. Stand supporting the lying press. Formerly a tub used to catch the paper cut from the edges.
Turning up. When books are cut in boards it is necessary to take the round out of the back. The process is assisted by the use of trindles and is called turning up.
Twelvemo. See Duodecimo.
Twenty-fourmo. A book having twenty-four leaves to a sheet.
Two on. See page 23.
Tying up. When leather covers are put on over raised bands it is necessary to tie them with twine so that the leather will stick to the sides of the bands.
Uncut. See Edges uncut.
Unopened. When the folds of signatures have not been cut the book is unopened.
Varnish. Bookbinder's varnish is used to give a gloss to leather. It is claimed that it acts as a preservative also.