Printer paper does work great. It's designed to be disposable, though, so the lightest weight will buckle under heavy ink, and it also yellows and fades more easily than "archival" papers designed for art.
The simplest kind of sketchbook I would make is a manila file cover for printer paper, bound by a binder clip. The manila is stiff enough to add some protection, and the clip makes it rigid.
The simplest kind of sketchbook I would make is a manila file cover for printer paper, bound by a binder clip. The manila is stiff enough to add some protection, and the clip makes it rigid.