Refractor...what exactly does that mean
Forigive my ignorance on any cards after 1985...but what exactly does 'refractor' mean...is that just for Topps...does it refract light? I know they are special cards that were sold with the regular cards as inserts in packs...but just curious as to the name...they aren't called 'inserts' they are called 'refractors'...
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