How to store graded cards and slabs
Protect slab surfaces, prevent impact and crowding, keep certification records and remember that encapsulation does not control the room.
A slab is not a complete storage environment
Encapsulation reduces direct handling, but the case can still be scratched, cracked, dropped, exposed to light or stored in damaging conditions. PSA's guarantee terms exclude environmental damage such as sunlight, mould, fire and water after grading. CGC's guarantee likewise describes improper storage conditions including extreme temperature, moisture, excessive light, motion, impact and vibration.
Treat the slab as one layer: card → encapsulation → fitted outer protection → storage box or display → room.
Choose an outer container by the slab
Different grading companies and holder generations can have different outer dimensions. Measure or check the exact case before buying sleeves, dividers or a box. The fit should prevent uncontrolled movement without needing pressure on the case or label.
An outer slab sleeve can reduce scuffing and dust. It does not make a cracked case secure, seal out floodwater or block all light. Replace dirty or torn outer sleeves away from the card face and case seams.
Store without leaning pressure
Use a fitted box with dividers so slabs stay supported and can be lifted individually. Avoid a long leaning row that transfers weight to the first holder. If stored flat, keep stacks short, stable and free from unrelated weight. Follow the outer case maker's limits where provided.
Keep labels readable and avoid adhesive labels directly on the grading case. Place location information on the outer sleeve, divider or box.
Record the certification and condition
For each slab, record:
- grading company and certification number;
- label description and grade as shown;
- current storage location;
- front and back photographs;
- visible case scratches, chips or cracks;
- inspection date.
Verify certification through the grader's official service when relevant. A matching number does not replace checking that the physical label and card correspond to the record.
Display needs a return-to-storage plan
A clear slab can still expose a card to light. Keep it out of direct sunlight, limit display time and support the case so it cannot fall. Do not hang or mount a slab with adhesive that can fail or contaminate the case.
If the case is cracked, open at a seam, heavily scratched over the card or no longer holds the card securely, use the damaged slab guide. Do not glue, polish or open it yourself.
Sources & checks
- PSA authenticity and grade guarantee terms · Checked 2026-11-10
- CGC Cards certification guarantee · Checked 2026-11-10
- Library of Congress: care, handling and storage of works on paper · Checked 2026-11-10