What are the differences between various types of comic book bags, such as polypropylene, polyethylene, and Mylar, and how does each affect comic book preservation?

What are the differences between various types of comic book bags, such as polypropylene, polyethylene, and Mylar, and how does each affect comic book preservation?
Admin on June 26 2025 at 05:14 PM in Comic Book Supplies & Accs
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