I have some documents I'm quite proud of and I would like to properly frame them. I will require one "double certificate" frame, and one single frame for the three to kind of flow together. Just wondering if OT can recommend what to look for to insure the frames protect the documents for the future. I've read a little about long term acidic build up in some mats and papers so I guess I want to avoid that. is the quality of seal int he picture frame important? does air and light damage documents over the years? All guidance appreciated.