It's a matter of lots of long duration of direct bright light. I don't know how many people are displaying their graded cards in direct sunlight all day, day in and day out. There are many UV-protectant products if needed.
Last time I checked, graded card holders are not entirely UV-protectant, but they should be.
Last edited by drcy; 10-19-2022 at 03:20 PM.
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