Conservation framing involves two main components. 1. The materials used and, 2. The techniques used to mount the item being framed.
All of the mat board, foam core and other mounting materials that I stock are buffered and acid free so no off gassing takes place that can damage framed items.
All glass and acrylic that I stock block 99% of the UV rays that damage and fade items being framed.
Conservation mounting techniques involve mounting the item so it is not damaged in any way and can be removed from the frame many years down the road and look as good as it did when first framed. Pictured above are corner mounts used for artwork.
The mat pictured above demonstrates fading of the mat color caused by UV rays and browning of the bevel caused by off-gassing of cheap mat board. The artwork that this mat was used on was also faded.
If you have something that has significant sentimental or financial value, then conservation framing should be considered an investment to preserve that value for many years to come.