Preserving hide glue from decay
Is wet hide glue going bad after a week or so biological decade, due to bacteria? Or chemical in nature?
Can preservative be added to extend wet hide glue life?
Can simple salt be added as preservative? Salt (as solid) is used to prevent creep in gluing up (laminating) with PVA and yellow glue, so salt should not weaken PVA or yellow glue joint. How about with hide glue?