The binder in Portland told me to stop gluing the spine flat and I finally get why
I used to glue every book spine flat against the board, nice and tight, thought that was the right way to do it. Then last month at a workshop in Portland, this older binder named Ruth watched me finish a journal and just said, "You're fighting the paper, let it breathe at the hinge." She showed me how a little gap at the shoulder lets the pages open without cracking, and my last 4 books have held up way better. Anyone else change how they glue spines after a random comment like that?
How much of a gap are we talking at the shoulder, like a credit card thickness or more? I've been gluing tight for years and my hinges always crack right where the spine meets the board after a few months of heavy use. Does the gap change based on paper weight or how thick the signature stack is? Ruth's rule might work for journals but what about a 400 page book with stiff paper?