QUOTE (fike @ Feb 23 2009, 07:04 PM)
My guess is that it is the positionable mounting adhesive that continues to outgass and fog your glass. That stuff is not archival and continues to break down the paper and degrade the ink for decades. When you frame an image, you want to avoid applying any glues or adhesives. Ideally, you would use photo corners or channels to hang the image within the mat. I don't use photo corners because most of my stuff is too wide, so another alternative, albeit not as good as photo corners, is to use linen tape and hang the print from the back of the mat. This allows the print to expand and contract without ripping. It also minimizes outgassing and hazy residue.
Boy I hope you are wrong about that, I've using the pma for a few years now. If it were the pma why would the haze be an almost perfect reflection of the print? I would expect an even distribution of haze if the pma were the culprit.
The PMA has nothing to do with the outgassing you are seeing. It is solely due to the inks in the print giving up their gasses. Heat mounting it or heating it up in a press does minimize it.
I have alot of my Epson pigment prints hanging for years and they have all been dry mounted and I have no gassing problem.
In all of the years of this discussion whether here or at the framing grumble site there has never been any mention or clues that pointed to PMA being the source of the problem. It is the inks, plain and simple.