How do I frame an old blueprint?
Q. Dear Donia,
A. Dear Robert,
What an exciting piece of family history! First, it would be best to get a good digital image made as a backup and also as a way for you to share the image with your whole family!
It is best to mount your blueprint in a window mat. The mat and mount should be a good, museum-quality mat board (most frame shops will have this type of mat board). The glass should be UV-coated to protect the color and give it a longer life. If you want to use Plexiglas to save on the weight if the blueprint is large, Lexan would be the best choice as you can find UV blocking Lexan. The piece can then go into a frame of your choice and displayed anywhere away from any direct source of bright light.
For more in-depth information, please see the NEDCC Preservation Leaflet on Matting and Framing for Works on Paper and Photographs.
Good luck with this great project!