Yes, indeed. Over a dozen of my B&W silver prints dry mounted years ago have a slight yellowing on the mat boards around the edges of the floating photos. Unfortunately, at this late date I don't remember exactly which mounting tissue was used. The rag mount board was from Light Impressions. Oh well, I can recycle the frames and glass. Much worse, a Cole Weston print bought about 32 years ago has the same problem. I now print on oversize paper and hang the prints on the mount board. They don't look as good as dry mounted prints, but can always be dry mounted later.
Originally Posted by Bill Burk