When developing and storing color (or black and white for that matter) slide film, I've seen that you have two major types of slide mounts: glass and glassless.
From what I've read, glass is better for storage because if your slides get shuffled around then scratched you're ruined and glass will help prevent that.
On the other side, you have glassless which is significantly cheaper.
It sounds like for long term preservation glass would be preferred; however, glass isn't perfectly smooth. So will handling the slides, looking at them, and projecting them damage the slide in the long term?
Also, if the slides are just kept in binders and seldom viewed, how much of a difference will I see with just putting them in glassless slides, in a Print File slide sheet, and in an archive binder?
Is it going to matter that much with that setup compared to doing the same thing with glass slides?