What does this mean?
Art is fragile, especially art on paper or canvas. Both are friable (they tear easily), scuff, stain, discolor, and fade. Some damage is inevitable (especially fading) even with the best of materials. BUT, we can reduce or eliminate much of the potential damage that can happen.
What I and most framers do is Preservation Framing. If conservation is needed I take it to a conservator. I know several: Paper, works on canvas, and frame. I also work with photographer David Krapes and Jan Mathis of Studio 315 in Newberg, Oregon.
Glazing; glass, acrylic or none
Sally Dallas, Artisan Framer