A card left proudly on a sunny windowsill for a few years is one of the most common and most preventable ways collectors damage their own cards.
UV exposure is cumulative
Sunlight's UV component fades printed ink and can yellow card stock over an extended period, and unlike many forms of card damage, this happens gradually and often goes unnoticed until the change is already significant.
It affects grading too
Should a sun-faded card ever be submitted for grading, visible discolouration or fading counts directly against its surface and centring assessment — display damage isn't cosmetic-only once a professional grade is on the line.
Displaying safely
UV-protective display cases paired with indirect or LED lighting positioned away from windows let a collection stay visible and enjoyed without the slow degradation that direct sunlight causes over months and years.
Frequently asked questions
Can sunlight actually damage a Pokémon card?
Yes, prolonged UV exposure fades colour and can yellow the card stock.
Does sun damage affect a card's grade if submitted later?
Yes, it counts against surface and centring assessment.
What's a safer way to display valuable cards than direct sunlight?
UV-protective cases with indirect or LED lighting away from windows.