The Short Answer
- Print lines are factory defects that typically limit grades to PSA 8-9
- Corner whitening is the most common flaw affecting modern cards
- Surface scratches on chrome cards are visible under any light angle
- Edge chipping along colored borders drops grades 1-2 points
- Centering is the only flaw you can measure objectively before grading
Centering: The Measurable Defect
Centering is the only card defect you can measure precisely before submitting. It is also the most objective grading factor — graders measure borders with tools, not just eyeball them.
Centering Standards by Grade
| Grade | Front Centering | Back Centering |
|---|---|---|
| PSA 10 | 55/45 or better | 75/25 or better |
| PSA 9 | 60/40 max | 80/20 max |
| PSA 8 | 65/35 max | 85/15 max |
| PSA 7 | 70/30 max | 90/10 max |
| PSA 6 or below | 75/25+ | 95/5+ |
How to Measure Centering
- Measure left border in millimeters
- Measure right border in millimeters
- Calculate: Left / (Left + Right) × 100
- Example: 3mm left, 2mm right = 3/5 = 60/40
Tip: Use our free [centering calculator](http://127.0.0.1:1222/tools/centering-calculator) for instant measurements.
Centering vs Grade Impact
60/40 centering gets PSA 9, not 10. This single factor drops value 65-70% for modern rookies. Always measure centering before submitting.
Corner Flaws: From Fuzzing to Rounding
Types of Corner Wear
| Flaw Type | Visual Description | Typical Grade |
|---|---|---|
| Sharp (Gem) | No visible wear, 90° angle | 10 |
| Minor Fuzzing | Slight fiber lift, still sharp | 9 |
| Minor Whitening | White spot < 1mm on corner | 8-9 |
| Rounding | Corner curve visible | 7-8 |
| Heavy Whitening | White area > 1mm | 6-7 |
| Bent/Dinged | Physical crease or impact | 5 or below |
Corner Inspection Tips
- Use 5x-10x magnification
- Inspect all 4 corners — flaws often cluster
- Check under raking light for subtle whitening
- Chrome cards show corner flaws more than paper
Whitening vs Paper Loss
Whitening: Surface color loss, card still intact
Paper Loss: Actual material missing, structural damage
Whitening affects grade 1 point. Paper loss affects grade 2-3 points.
Edge Issues: Chipping and Fraying
Edge Defect Types
| Edge Condition | Description | Grade Impact |
|---|---|---|
| Perfect | No chipping, clean cut | No impact |
| Minor Chipping | < 1mm chips on colored border | -0.5 to -1 |
| Moderate Chipping | 1-2mm chips visible to naked eye | -1 to -2 |
| Heavy Chipping | > 2mm or multiple spots | -2 to -3 |
| Fraying | Fiber separation along edge | -1 to -2 |
| Edge Wear (Vintage) | Age-related degradation | Context-dependent |
Edge Inspection
Edges are best inspected by looking down the card's edge rather than straight on:
- Hold card vertically
- Look along edge under bright light
- Rotate card to inspect all four edges
- Note any white spots, chips, or roughness
Colored Border Impact
Cards with dark or colored borders (Topps Chrome, Panini Prizm) show edge chipping more than white-bordered cards. A 1mm chip on a black border is more visible than on white stock.
Surface Defects: Scratches, Dimples, and Clouding
Surface Flaw Identification
| Surface Defect | How to Identify | Grade Impact |
|---|---|---|
| Scratches | Lines visible under raking light | -0.5 to -2 |
| Dimples | Small indentations, shadow under light | -0.5 to -1 |
| Clouding | Hazy area on chrome/glossy | -1 to -2 |
| Fingerprints | Visible smudges, cleanable | Clean before grading |
| Gloss Breaks | Dull spots where gloss missing | -0.5 to -1 |
| Surface Creases | Wrinkles in surface layer | -2 to -4 |
Surface Inspection Technique
- Use bright, diffused light (avoid harsh direct light)
- Rotate card slowly under light
- Look for reflections that break or distort
- Use raking light (side angle) to reveal scratches
Chrome Card Special Considerations
Chrome, refractor, and glossy finish cards:
- Show scratches more than paper cards
- Prone to surface clouding (holographic pattern disruption)
- Fingerprints etch into surface if left long-term
- Clean with microfiber before grading
Print Defects: Lines, Spots, and Registration
Factory Production Defects
Print defects occur during manufacturing. They are not damage but still affect grades:
| Print Defect | Description | Grade Impact |
|---|---|---|
| Print Lines | Roller marks, parallel lines | -0.5 to -2 |
| Color Spots | Extra ink dots | -0.5 to -1 |
| Registration Issues | Misaligned colors | -1 to -2 |
| Missing Foil | Holographic areas blank | -1 to -3 |
| Wrong Back | Incorrect card back | Error premium |
Print Lines vs Scratches
Print Lines:
- Usually straight or slightly curved
- Parallel to card edges or print direction
- Part of the printing process
- Cannot be cleaned or removed
Scratches:
- Random directions
- Break surface gloss
- Caused by handling
- May be cleanable if surface debris
Print Defect Acceptance
Some print defects are acceptable in lower grades. A PSA 8 allows one minor print line. PSA 9 allows very minor print spots. PSA 10 should have essentially no print defects.
Structural Damage: Creases and Wear
Serious Damage That Kills Grades
| Structural Damage | Visual Signs | Max Grade |
|---|---|---|
| Major Crease | Visible line through card stock | PSA 5 |
| Multiple Creases | 2+ visible creases | PSA 3-4 |
| Writing | Pen/pencil on card | PSA 1-3 |
| Tape/Stains | Adhesive residue, discoloration | PSA 1-4 |
| Paper Loss | Missing pieces, holes | PSA 1-2 |
Creases vs Wrinkles
Crease: Full break in card stock, visible from both sides, permanent structural damage. Limits grade to PSA 6 or below.
Wrinkle: Surface-only disruption, may be subtle, limited to top layer. May allow PSA 7-8 if minor.
When to Not Grade
Cards with structural damage (creases, writing, tape) will grade 5 or below. For modern cards, this makes them worthless. For valuable vintage ($500+ raw), even a PSA 3 has value as authentication.
Defect Summary
Understanding defects helps you:
- Estimate grades before submitting
- Avoid wasting money on low-grade cards
- Price cards accurately for sale
- Identify authentic wear vs production issues
Always inspect cards under magnification and bright light before making grading decisions.
Frequently Asked Questions
What are the most common card defects?
How do I identify print lines vs scratches?
What defects prevent PSA 10?
How much do defects lower grades?
Can I clean surface defects before grading?
How do I check for card defects?
Are factory defects graded differently?
Should I grade a card with a crease?
Sources & Further Reading
With submission floors rising, pre-screening is no longer optional. Use our AI Pre-Grade Calculator to score a card's PSA 10 odds before you pay, and the Submission Planner to pick the right tier.