My weird experiment with a 50/50 PVA to wheat paste mix for spine lining

Everyone in my local guild swears by pure wheat paste for flexibility, but I mixed it half and half with Lineco PVA for a repair on a 1920s hymnal. The spine got weirdly stiff, almost like cardboard, after it dried for a week. I learned that the PVA's faster drying time might have locked everything in place before the wheat paste could do its thing. Has anyone else had a glue mix backfire on an older text block?

3 comments

3 Comments

nina_harris2d ago

Seen this happen with all kinds of mixes, not just glue. People try to blend a fast-acting modern thing with a slow, traditional process and it just fights itself. Like using instant yeast in a sourdough starter, it ruins the whole timing. Your PVA basically set the structure before the wheat paste could add any flex.

ninam862d ago

My cousin tried that exact PVA and wheat paste mix last year, total disaster. It's so frustrating when the chemistry just refuses to work together lol.

janahenderson2d ago

Yeah, the "ruins the whole timing" part is the perfect way to put it. It's like trying to add a parachute after you've already hit the ground. The fast glue just wins, every single time. You end up with this brittle mess that cracks because it never got to work as a team. So much for trying to be clever and mix things. Should have just picked one lane and stayed in it.