Based on the damage and the face they were stuck together, enough humidity or moisture got in there. That type of damage is not just age, acid or wear
https://www.notebookstories.com/2024/09/10/notebook-deterioration/#comment-1413723
Oh I am right there with you! I absolutely adored my Dayrunner from day one, which was long long ago. When I was going through things recently I came across some very similar deterioration with t...
https://www.notebookstories.com/2024/09/10/notebook-deterioration/#comment-1413672
A different issue, but this reminds me of the rubber band problem. Almost all of them stretch out and become useless. Always such a weird feeling to pick up an old journal and realize it’s got ...
https://www.notebookstories.com/2024/09/10/notebook-deterioration/#comment-1413645
That’s no fun, I’m sorry. I’ve had similar experiences- it’s the rubber in the cover reacting to trapped moisture and it eventually breaks it down and liquifies into unmanageable stickine...
https://www.notebookstories.com/2024/09/10/notebook-deterioration/#comment-1413641
I think that's one reason traveler's notebooks come with dust bags. Perhaps you could get simple linen bags to put some of your notebooks in.
https://www.notebookstories.com/2024/09/10/notebook-deterioration/#comment-1413619