The Image Permanence Institute has a great article with detailed instructions and diagrams on Preservation Framing of Photography. This is great information we think might be very helpful to many of our customers so we got permission from them to host a copy on our website: Consumer Guide to Materials for Preservation Framing and the Display of Photographic Images

Image Permanence Institute has other articles in addition to this one in PDF form on their website here: http://www.imagepermanenceinstitute.org

Cheers,
Mark