Chrome condition traps: what stops the PSA 10

Grading economics turn on the 10-vs-9 spread, so the real question when buying raw is: what could stop the 10? A large part of this catalog is chromium — the chrome flagship and its update set, the chrome prospect issues, the chrome rookie autographs and Sapphire — and chromium stock has specific, well-documented failure modes, some of which cannot be judged from listing photos at all.

The five traps

• Centering. A PSA 10 needs roughly 55/45 centering on the front and 75/25 on the back, and chromium sets are widely reported to run off-centre left to right. A card that looks fine at a glance but sits at 65/35 is capped at a 9 before anything else is considered. This one IS checkable in photos — measure the borders, don't eyeball them.
• Surface. Chromium shows every micro-scratch under raking light, and cards can leave the pack already scratched. This is usually not determinable from listing photos — treat surface as a stated unknown, never an assumed pass.
• Print lines. Thin horizontal printing artefacts in the foil, disqualifying for a gem grade and easy to miss in a phone photo.
• Edge chipping. Silver flaking along the borders — worst on dark-bordered color parallels, where the contrast makes every chip visible. A blue or black-bordered parallel deserves extra scrutiny for exactly this reason.
• Curl. Chrome stock curls with humidity, and graders see it even when a sleeve hides it in photos.

What this means for buying raw

Only a small fraction of modern submissions gem — a useful context number is 2–5% across modern cards, though any specific card's odds depend on everything above. Rather than guessing a gem probability, compute the break-even gem rate: the fraction of tens that would make the purchase profitable. If a listing's photos can't rule out the traps above and the math needs a 60% gem rate, the card is not a grading play, whatever the seller says.

The paper half of this catalog fails differently

Not everything here is chrome. The flagship paper cards, the heritage line, the Bowman paper rookie and every Japanese issue are paper stock, and paper does not curl or throw print lines in the foil the way chromium does. Its risks are corners, edges, surface wear and — on cards now well over a decade old — however they were kept by whoever had them first. Centering still applies. Nothing else on this page transfers, so do not read a chrome checklist over a paper card and call it due diligence.