Rigid Box Quality Control: What We Check Before Your Boxes Ship
Corner alignment, print registration, edge wrapping and magnet strength. See exactly what we inspect at every production stage — so your boxes arrive perfect. Chengtop Packaging’s QC guide.
- See the full QC checklist for rigid boxes
- Know what we check at each production stage
- Understand common defects and how we catch them
- Learn our sample approval process
- Know what to look for when you receive your boxes
- Avoid quality surprises in bulk production
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Descrição
Quality Is Checked, Not Hoped For
A beautiful design on paper doesn’t always translate to a perfect box. Misaligned corners, off-color printing, loose magnets — these defects only show up in production. We check at every stage so you don’t find problems after delivery.
Our QC Stages
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Stage
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What We Check
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When
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Material inspection
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Board thickness, paper color, print proof
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Before cutting
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Sample approval
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Full sample checked by you
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Before bulk
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In-line QC
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Print quality, die-cut accuracy
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During production
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Assembly QC
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Corner alignment, glue, lid fit
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After assembly
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Final inspection
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Full check, packing
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Before shipping
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What We Check: The Details
Corner Alignment
- All four corners meet at 90 degrees
- No gaps or overhang on corners
- Wrap paper folds cleanly around corners
- No bubbling or wrinkles at corners
Qualidade de impressão
- Colors match approved Pantone swatches
- Print registration is precise (no misalignment)
- No smudges, scratches or ink marks
- Foil stamping is clean and sharp
Edge & Wrapping
- Wrap paper is smooth, no bubbles
- Edges are clean and straight
- No exposed greyboard on edges
- Edge painting (if ordered) is even and complete
Lid & Base Fit
- Lid fits snugly on base
- No wobble or loose fit
- Magnetic closure snaps shut properly
- Drawer slides smoothly
Common Defects We Catch
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Defect
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How We Catch It
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Misaligned corners
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Visual check + measurement
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Off-color printing
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Compare to Pantone swatch
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Weak magnets
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Open/close test 10 times
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Loose lid fit
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Lid drop test
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Paper bubbles
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Run finger over surface
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Scratches on finish
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Visual inspection under light
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Glue marks
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Visual check inside and out
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Wrong dimensions
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Measure with ruler
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Sample Approval Process
Antes da produção em série:
- We produce a pre-production sample
- We photograph it from all angles
- You review and approve (or request changes)
- Only after your approval do we start bulk
This catches design issues before thousands of boxes are made.
Our Acceptance Rate
- Print quality: 98% pass first check
- Corner alignment: 99% pass
- Magnet strength: 99.5% pass
- Overall: Under 2% defect rate in finished boxes
Any defective boxes are replaced before shipping. You pay for good boxes only.
What You Should Check When Boxes Arrive
- Open one carton — Inspect 3–5 random boxes
- Check corners — Are all four corners clean?
- Check printing — Does color match your sample?
- Open and close — Does the lid fit right?
- Check edges — No exposed board or wrapping issues?
- Report any issues — Within 7 days of delivery
Common QC Mistakes Buyers Make
- Skipping sample approval — First time seeing boxes is 1000 units
- Not checking color under right light — Colors look different under fluorescent vs natural light
- Ignoring minor defects — Small corner gap becomes 1000 boxes with corner gaps
- Not measuring dimensions — “Looks right” isn’t good enough
- No quality agreement — No clear standard for what’s acceptable
How We Ensure Quality
- Pre-production sample approved by you
- In-line QC at every production stage
- Final inspection before packing
- Under 2% defect rate target
- Defective boxes replaced free
Want To See Our QC Process?
We send you sample photos and progress updates throughout production. Contact us to learn more.
E-mail: chengtop888@outlook.com
WhatsApp / Telemóvel: +86 15272060604
