Most repairs involve moisture of some kind, be it paste or glue. When moisture is introduced into paper, board or cloth, special precautions need to be taken. A wet repair should be isolated from other pages in a book or it can adhere itself to adjacent pages and the book will not open correctly. Repair to the cover of a book must also be protected until dry. The simplest way to isolate and protect a paper repair is with a moisture barrier, such as…