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Polypro Protective Sleeves are a cost effective archival alternative to Mylar. Photofile's Polypro Protective sleeves are made of the highest quality polypropylene available. A state-of-the-art manufacturing process ensures that edge folds lie flat - no seal required! The sleeves are recognized by the National Standards Institute as "particularly suitable for photograph film" since it is "generally inert, unplasticized and has good chemical stability."
