Frame family photographs without damaging the original: six steps
Use a suitable mat to keep photos off glazing, display a copy when possible, and limit light and humidity damage.
Wikimedia Commons · Lee Haywood / Wikimedia Commons — CC BY-SA 2.0 · CC BY-SA 2.0 ↗
The Library of Congress warns that long-term display can cause irreversible light damage even with UV-filtering glazing. For a valuable original, preserve the original in safe storage and frame a good reproduction; the cover photo is illustrative, not an archival-certified frame.