What are archival and conservation-grade products?
In general, archival or conservation grade products are acid-free, lignin-free, and free from anything else that can damage your artwork, photography, or other items intended to be preserved. Manufacturers who supply archival or conservation grade products should be able to provide documents describing these archival characteristics at the very least or have test results on file for you to review. Although acid-free products might not cause any initial damage, it is possible for them to break down relatively quick; becoming a danger to the item you are trying to protect. Like everything else there are varying degrees of archival. Depending on your need for preservation you may require higher-grade materials for use in and along side your items. Crystal Clear Bags and our Crystal Clear Photo Boxes are high grade “museum quality” products. They are 100% virgin polypropylene which is naturally acid and lignin-free. 25.