How do different types of comic book sleeves and bags (e.g., Mylar vs. polyethylene) affect the long-term preservation of comic books?

How do different types of comic book sleeves and bags (e.g., Mylar vs. polyethylene) affect the long-term preservation of comic books?
Admin on May 26 2025 at 08:59 PM in Comic Book Supplies & Accs
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