Acid Migration through hinging tape?

[prospero]

** Btw. You don't have to keep quoting big chunks, on especially consecutive posts.

Bear in mind that water-activated tapes are not the same as hinges that are torn from handmade long fibre paper (commonly
referred to as 'Japanese' paper) and stuck with starch paste which mix and you cook up yourself.

[Not your average framer]

A second piece of mountboard added behind the first piece of mountboard will make sure if you are particularly concerned about that.