Cancels. Leaves containing errors which are to be cut out and replaced with corrected pages.
Canvas. See Duck.
Caps. Paper coverings used to protect the edges while the book is being covered and finished. Also the leather coverings of headbands. See Head cap.
Case bindings. The ordinary cloth binding of commerce. Books in these bindings are folded and sewn, rounded and backed by machinery. A machine also makes the cases, covering the two pieces of cardboard which form the sides with cloth as needed. These cases are separately printed before being put on the books. The book is then glued and put into its case by machinery.
Catchword. A word placed under the last line on each page of some old-time books, the word being the same as the first word on the next page; a direction word.
Center tools. Tools cut for ornamentation of center of panels and sides of book covers.
Circuit edges. Bibles and prayer-books are sometimes bound with projecting covers turned over to protect the leaves; these are called circuit or divinity edges.
Clasp. A hook or catch for fastening the covers of a book together, usually at the fore edge.
Clearing out. Removing the waste paper and paring away superfluous leather upon the inside, preparatory to pasting down the lining-paper.
Cloth boards. Stiff boards covered with cloth.