Hi, A lot of the old paperbacks we have, have a cut through either the top or the bottom of the book from cover to cover. It is usually about 2 mm square. Does anyone know what this is. Is it something printers do to indicate that something is wrong with the copy?
Also, one of my paperbacks has a stamp stating "pulp" inside the front cover. What does this mean please?
Many thanks for any advice anyone can give.