Binding a book, most often you’d use some amount of glue. Now you’re trying to use as little as possible – inevitably, glue introduces humidity, and humidity plus paper means stretching, then shrinking when drying again; and this never happens evenly so you end up with bends. The press, therefore, is indeed necessary to keep your books flat.
Binding a book, most often you’d use some amount of glue. Now you’re trying to use as little as possible – inevitably, glue introduces humidity, and humidity plus paper means stretching, then shrinking when drying again; and this never happens evenly so you end up with bends. The press, therefore, is indeed necessary to keep your books flat.