How should I frame and display antique maps and prints safely?

Use conservation framing. Ask for acid-free mats and backing, sometimes called museum or archival quality, so the materials do not yellow or damage the paper over time. The piece should be attached with reversible, archival hinges rather than glued, taped, or dry-mounted, which can cause permanent harm and reduce value.

Protect it from light. Ultraviolet-filtering glazing helps, but it is still best to hang maps and prints away from direct sunlight and bright lights, since colors and paper can fade. Avoid damp walls, bathrooms, kitchens, and spots above heat sources, where humidity and temperature change a lot.

If an old frame contains a print with cardboard backing, wood backing, or tape, consider having it reframed by a framer experienced with works on paper. Before any cleaning, flattening, or repair, consult a paper conservator. Well-meant home repairs often do more damage than the original problem.