Quote Originally Posted by StigHagen View Post
I don't agree with the opinion "if the mat gets broken the image is ruined". Does not the mat somehow protect the image, is it not more protected with it fixed to a strong surface, than the paper alone? ...
True to a certain extent, but in some cases the print itself is damaged or otherwise need TLC -- perhaps a chemical treatment and/or washing -- hard to do that when it is dry-mounted with non-reversable mount tissue.

For example back in the good old days, some platinum prints were never fully cleared, and ways have been developed to treat these to preserve them from further damage...and even reverse some of the damage perhaps. This assumes of course that the print is worthy of the time and effort.