The Stamp Hinge Experiment

Do you swear by Dennison hinges? More to worry about. Want to worry even more? The Arthur Salm foundation is the place to hang out.http://stamps.org/userfiles/file/pc...diary_19.pdf

Yes the testing does show that the Dennison hinge to be a bit more acidic than a Fold o Hinge. But in all the hinges the standard PH seems to be between 5 & 6. That basically means that most if not all the hinges sold has a potential problem of being acidic. If that's the case has there been much complaints from collectors with hinged material eating away the stamp or pages? To me it would seem that if the acidic hinge, at least the more popular ones, was destroying collections left and right we would have heard more.The question I have is does the acidity of the hinge react when dry or only when wet? My supposition is that the adhesive acidity is active when wet but its destructive properties is limited when dry.

I know with the project I am working on the adhesive mixture has a PH between 5 & 6. This confirmed to me that I was on the right track to finding a solution to the peelable stamp mystery. So far to what I have figured out, and presently in the process of testing, the solution is not only in the adhesive but in the process of laying that adhesive to the paper media. I have not yet thought about tweaking my mixture to make it neutral but don't know if it is necessary.

Wish you guy come up with a final answer before the next major PHILATELIC STAMP HINGE EXHIBITION ,the time is close for one, it has been 25 years since the last one .