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Plastic Storage Concerns - Acid Free/Archival?
I was wondering if anyone knows if there is any concern over storing Lego in plastic bags?
I have been storing my minifigures in 2x3 white block polyethylene bags like these from Ulinehttps://www.uline.com/Product/Detail/S-1905/Poly-Bags-White-Block/2-x-3-2-Mil-White-Block-Reclosable-Bags
You can also get similar bags that are polypropylene and considered safe for archiving, They are advertised as naturally acid free and lignin free. They tend not to be as pliable of a material and I can't find them in as many sizes as the polyethylene ones.
I know acid is a concern for paper which is why I have all of my instruction books in acid free sheet protectors but I can't find an answer if this is a concern for Lego.
I am also concerned about long term storage of pieces in Ziploc or similar bags.
Does anyone know any downside to storage of Lego in plastic bags that are not acid free?