Ultra Pro is just dandy for run of the mill items. They are made from polyethylene, which is much better than vinyl, bit not considered archival despite the ads. Mylar [polyester] is really the gold standard. It is considered inert and is recommended by the Library of Congress. I switched most of my really good items to mylar holders recently, the things I want to keep as long as I collect. Cost me about $500 in materials.
Last edited by Exhibitman; 06-29-2015 at 11:45 AM.
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