Corner Wear & Edge Whitening: What Card Graders Look For

After centering, corners and edges are where most cards lose points — and they’re the easiest damage to miss with the naked eye. Here’s what graders look for and how to check at home.

Corners

Graders inspect each of the four corners under magnification for sharpness. The things that hurt a grade:

• Whitening — the corner’s color has worn through to the white cardstock underneath, showing as a pale tip.
• Softness / rounding — a once-sharp point looks blunt or “mushy” from handling.
• Dings & bends — a small fold or dent at the tip.

A single noticeably soft or white corner can be the difference between a 9 and a 10, even if everything else is perfect.

Edges

Run your eye along all four edges looking for:

• Edge whitening — a thin white line along the border, most visible on dark-bordered cards.
• Chipping & nicks — small bites out of the edge.
• Rough or wavy cuts — a factory cut that isn’t clean.

Why darker borders are harder

Cards with black or dark borders (many modern Pokémon and sports cards) show every speck of edge and corner whitening, so they’re graded more harshly on these factors than light-bordered cards. If you collect dark-bordered cards, inspect the corners and edges especially closely.

How to inspect at home

• Use bright, angled light and a loupe or your phone’s zoom.
• Check corners against a dark background so whitening stands out.
• Compare opposite corners — wear is often uneven.
• Look at the back too; corner damage frequently shows there first.

SlabWorthie’s report includes close-up corner and edge views with a reference guide so you can judge whitening yourself — a visual aid, not a scored measurement. Pair it with the four grade factors and a centering check before you submit.