How to Scan Graded Cards

Scan a graded card on a flatbed, slab face down on the glass, with the lid left open and a dark cloth draped over the slab to kill reflections. That is the whole method. The reason it differs from scanning a raw card is physical: a slab is about a quarter-inch of rigid plastic, and that thickness breaks both of the easy approaches.

Never put a slab through a sheet-feed or ADF scanner. It will not pass the rollers, it will jam, and a jammed slab can be scratched or cracked. Feed scanners are excellent for bulk raw commons and completely wrong for graded cards — that distinction is the substance of flatbed vs ADF scanner for cards.

Thickness. The slab lifts the scanner lid off the glass, which lets room light flood the scan area and produces washed-out edges and a grey cast. It also pushes the card surface further from the glass than the scanner expects, which can soften focus at the edges on cheaper units.

Reflection. The case is polished plastic and the scanner lamp is a bright moving line. Scan a slab naively and you get a hard white band across the card where the lamp reflected straight back into the sensor — usually directly over the part of the card you wanted to show.

The label. The grading label is the most important part of the scan for a collection record, and it sits at the top of the slab where lid-lift light leakage is worst. A scan that captures the card beautifully and blows out the cert number is not useful.

1. Clean both the scanner glass and the slab face with a dry microfibre cloth. Dust on either surface shows up as specks that look like card defects.
2. Place the slab face down on the glass, squared to the edge of the scan bed rather than at an angle, with the label fully inside the scan area.
3. Leave the lid open — forcing it down on a slab stresses the hinge and does not seal anyway.
4. Drape a dark, non-reflective cloth over the slab and the surrounding glass. This blocks room light and absorbs the lamp reflection at the same time.
5. Turn off or dim nearby lights, and avoid scanning next to a sunny window where the light level changes mid-scan.
6. Scan at 600 dpi for a listing or collection record, higher only for archival purposes. Save as a lossless format if the scan is a permanent record.
7. Check the result at full size for the white reflection band and for a legible cert number before moving to the next slab.

Turning auto-correction off is the least obvious and most useful of those. Scanner software looks at the whole scan area to set exposure, and a slab presents it with a bright white label and dark borders — so it compensates in a way that makes the card itself look wrong. Fix exposure manually once and reuse the setting. The general version of this is in best scanner settings for cards.

For a quick collection record, often yes. For a listing photo or an archival scan, usually not — and the reason is the same reflection problem, made worse. A phone adds its own reflection of you and the room into a polished slab face, and a phone flash on a slab is guaranteed to blow out a section of the card.

If the phone is what you have, shoot in bright indirect daylight with the flash off, hold the phone parallel to the slab rather than angled, and move until your own reflection is out of frame. Recognition apps generally cope with slabs reasonably well because they read the label rather than the card art. App options are in best sports card scanner apps and the trade-off in full in scanner app vs flatbed scanner.

An overhead contactless scanner removes the thickness and pressure problem by not touching the item at all — no rollers, no platen, nothing resting on the slab. For a collection of genuinely valuable slabs, or for someone who dislikes putting a slab face down on glass at all, it is the cleanest answer available.

It still needs the light managed, since an overhead unit sees whatever the room is doing to the slab's surface. The broader comparison of scanner types is in best card scanners and best flatbed scanners for cards.

A scan is only worth making if it ends up somewhere findable. For graded cards the useful record pairs the image with the cert number, the grade, the grader and the date you acquired it — the cert number being the one field that uniquely identifies the slab and lets anyone verify it against the grader's own population report.

File naming by cert number is the simplest durable system, and it survives any software you later move to. The cataloguing workflow end to end is in how to catalog a card collection, and tracker options in best collection tracker apps.

Scan before you store, not after. Once slabs are in a storage box or a wall display, pulling them out again to photograph is work you will keep postponing — and the scan is most useful precisely for the cards you handle least. Storage options are in best slab storage boxes and how to store graded cards. For raw cards, the method is different and simpler: see how to scan sports cards.