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How to store and protect your cards

Updated: 2026-10-15

Keeping a card in good condition takes three things: a soft sleeve, a rigid holder if it's worth anything, and storage that is dry, dark and free of sudden temperature changes. Most cards get damaged by handling without a sleeve, by binders that squeeze them, or by humidity.

Protection, from least to most

Protection	What it's for
Penny sleeve	The basic one. Prevents scratches and fingerprints. Every card you care about should be in one.
Deck sleeve	Thicker and opaque on the back. Made for shuffling and playing, not for display.
Toploader	Rigid plastic holder. The card goes in already sleeved. Ideal for storing and shipping.
Semi-rigid	More flexible than a toploader. Many grading companies prefer receiving cards in these.
Magnetic holder	Hard case with a magnetic closure. For displaying expensive raw cards.
Slab	The sealed case of a graded card. Very protective, but it scratches too: keep it in its own sleeve or box.

How to sleeve a card without damaging it

• Clean, dry hands, or cotton gloves if the card is valuable.
• Slide it in along the short side, pushing gently from the middle, not from a corner.
• If a sleeve is tight, use another one: forcing it is the fastest way to bend a corner.
• In a toploader, put the card in with its penny sleeve on and upside down (sleeve opening facing down) so it can't slide out.

Binders

They're great for browsing your collection, but they don't all protect equally:

• Go ring-free. In ring binders, the cards closest to the spine end up marked by the pressure of the rings.
• Side-loading pockets: the card goes in from the side and doesn't fall out when you turn the binder.
• PVC-free, acid-free materials: old PVC pages can release substances that damage cards over time. Look for polypropylene and "PVC-free" on the label.
• One card per pocket, never forced. Two cards in the same pocket rub against each other.
• Store binders upright, not lying flat with weight on top.

Humidity, heat and light

• Humidity: the main enemy. Cards are made of card stock and they curl, warp or develop spots. Avoid basements, storage units and exterior walls. A few silica gel packets in the box help; replace them now and then.
• Sudden changes: a very dry spot next to a heater isn't good either. Ideally, somewhere stable at room temperature.
• Light: direct sun fades ink and yellows plastic. Don't display valuable cards by a window; if you display them, keep them out of the sun or in UV-protected cases.

If a card arrives curled (common with holos), don't press it under weight or apply heat. Leave it sleeved inside a toploader somewhere stable, and it often flattens out on its own over time.

What not to do

• Rubber bands around a stack of cards: they dent the edges.
• Tape directly on the sleeve or the card.
• Loose cards in boxes where they slide around and rub.
• Writing on top of a sleeved card: the pressure marks it.

Sealed product

Packs, boxes and Elite Trainer Boxes suffer too: humidity and light affect the cardboard and the plastic. Keep them somewhere dry and dark and, if they're valuable, in acrylic cases that fit. Damaged wrapping takes value off even if the contents are fine.

And before you store it, log it

A well-stored collection is also a well-catalogued one: knowing what you have, where it is and what it's worth. If a card looks special, check how much it's worth first and decide what protection it deserves.

With the CardFolio app you add your cards with a photo or from the search, see your collection's value updated, and get an alert when a card you want drops in price.

Option	Price	What's included
No plan	€1.49	one analysis, no subscription
CardFolio Pro	€3.99/month	10 AI analyses a month
CardFolio Max	€9.99/month	50 AI analyses a month
CardFolio Élite	€19.99/month	up to 150 AI analyses a month

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