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Master CGC & Overstreet grading standards. Learn every defect, understand how they impact grade, and prescreen like a dealer.
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Comic Defects
Spine Tick
A short horizontal stress mark crossing the spine, usually near the staples, from opening the book or shelf wear. Two flavors: non-color-breaking ("negligible" — 1–2 are allowed at 9.8) and color-breaking, where white paper shows through and the grade drops much faster. Quantity matters as much as severity.
Severity9.6 NM+
NoneMinorModerateHeavy
1-2 tiny color-breaking ticks — where CGC typically lands them in practice
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Grade Impact
9.8 NM/M1–2 non-color-breaking ticks allowed as "negligible" handling defects (Overstreet). A visible color-breaking tick usually drops CGC to 9.6.
9.6 NM+1-2 tiny color-breaking ticks — where CGC typically lands them in practice
9.4 NMA few small ticks acceptable along spine
9.0 VF/NMMultiple small ticks, minor color breaks along spine
8.0 VFNoticeable spine ticks with some color loss
6.0 FNSignificant spine wear with multiple color breaks
Overstreet vs CGC: Know the Differences
The Overstreet Comic Book Price Guide and CGC both use the same grade scale, but they don't always agree on what qualifies. Overstreet defines 9.8 NM/M as "nearly perfect with negligible handling or manufacturing defects" — CGC often grades stricter in practice. Understanding these gaps helps you prescreen smarter.
Spine Ticks at 9.8
Overstreet
Allows a single almost-imperceptible bindery/spine tick as a "negligible" defect.
CGC in Practice
Most CGC graders will drop any visible color-breaking tick to 9.6. Non-color-breaking bindery marks sometimes pass.
Spine Stress at 9.8
Overstreet
Very minor non-color-breaking stress qualifies as a negligible handling defect.
CGC in Practice
CGC typically drops any visible stress line — even non-color-breaking — to 9.6.
Manufacturing / Bindery Defects
Overstreet
Negligible manufacturing defects (bindery chips, slight miscuts, ink specks) allowed at 9.8.
CGC in Practice
Inconsistent — some CGC graders allow tiny bindery marks, others drop to 9.6. Manufacturing defects are supposed to be graded more leniently than handling defects, but results vary.
Page Quality Requirements
Overstreet
Doesn't specify minimum page quality per grade in its definitions.
CGC in Practice
9.8+ generally requires Off-White pages or better. Cream to Off-White can cap at 9.6. Light Tan to Off-White caps at 8.5.
Pressing & Cleaning
Overstreet
Not addressed — Overstreet predates modern comic pressing.
CGC in Practice
CGC allows pressing (non-color-breaking defect removal via heat/moisture) and cleaning (dry cleaning, solvent removal) before grading. CCS is CGC's in-house pressing service. Pressing can legitimately raise a grade 0.5-1.0 points for stress lines, bends, and light creases.
Corner Blunting vs. Corner Crease
Overstreet
Both are handling defects. Blunting (dull corners without a crease line) is less severe.
CGC in Practice
Agrees with Overstreet here. Blunted corners typically 9.2-9.4 range. A crease that extends from the corner is more severe — 8.5 or lower depending on length.
Color Touch / Restoration
Overstreet
Restored books should be noted. Graded on apparent grade with restoration disclosed.
CGC in Practice
Uses a separate Purple label (restored) with A/B/C rating for extent of restoration. Even a tiny color touch gets a Purple label. Detected via UV light inspection. Restored books sell for 50-80% less than unrestored.
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