Custom folding carton with auto-lock bottom and PET window — the workhorse of retail packaging combining quick assembly, product visibility, and premium print quality. The auto-bottom design erects in under 2 seconds without manual folding, making it ideal for high-volume production lines. Manufactured by Guangdong Bincai Color Printing Co., Ltd.
Applications
| Industry | Product Category | Typical Use |
|---|
| Home Fragrance | Scented Candles | Single and multi-wick candles, candle gift sets, wax melts |
| Personal Care | Artisanal Soaps | Handmade soaps, soap gift sets, bath bombs, solid shampoo bars |
| Gourmet Food | Specialty Foods | Artisan cookies, chocolates, tea bags, coffee pods, dried fruits |
| Health & Wellness | Natural Products | Essential oil sets, herbal supplements, natural cosmetics |
| Pet Products | Pet Treats | Dog treats, catnip toys, pet accessory sets |
| Stationery | Gift Sets | Pen sets, notebook + pen combos, desk accessory kits |
Customization Options
- Board Grade: 350–450gsm C1S (coated one side) or C2S (coated two sides); FBB (folding box board) 350–500gsm; SBS (solid bleached sulfate) for food contact; kraft-back board for eco positioning
- Surface Finish: Gloss lamination (standard); matte lamination; soft-touch velvet lamination; aqueous coating; UV spot varnish for logo/texture highlight
- Window Options: Die-cut window with 0.3–0.5mm clear PET panel; full-face window for maximum product visibility; shaped window (circle, heart, brand silhouette); frosted PET for subdued look
- Printing & Effects: Full CMYK offset on KBA 1050 + Heidelberg 7+1 UV; spot Pantone colors; gold/silver hot foil stamping; holographic cold foil; embossing/debossing
- Closure: Auto-lock bottom (standard); tuck-top with friction lock; tuck-top with thumb tab; straight tuck or reverse tuck
- Size Range: 60×60×50mm (small tea light) to 300×200×250mm (large gift set)
- Add-ons: Tear-away euro slot for pegboard retail; hang-tab for shelf display; perforated tear strip; QR code printing; sequential numbering
Production Specifications
- Board Material: 350–450gsm C1S/C2S board; FSC certified options available; food-grade SBS for direct food contact per FDA 21 CFR / EU 1935/2004
- Auto-Bottom Design: Pre-glued auto-lock bottom with hot melt adhesive; erects in <2 seconds on assembly line; 4-corner glued bottom with reinforced construction
- Window Construction: Die-cut window opening; PET panel heat-sealed or adhesive-applied; edge-to-edge registration within ±0.5mm
- Printing: KBA Rapida 105 4-color offset (15,000 sheets/hour); Heidelberg CD 102 7+1 UV (CMYK + spot + coating in single pass); 175–200 LPI screen ruling
- Die-Cutting: Steel-rule die cutting with ±0.3mm tolerance; creasing for clean fold lines without cracking; waste stripping included
- Gluing: Automatic folder-gluer with hot melt adhesive; 4-corner and 6-corner gluing capability
- Lead Time: 10–15 working days (standard); 15–20 working days (with foil/embossing)
- Daily Capacity: 150,000–300,000 folding cartons
Quality Details
- ISO 9001:2015 certified
- FSC Chain-of-Custody certified (upon request)
- Food Safety: Food-grade SBS board with FDA 21 CFR compliance for direct food contact; migration testing available per EU 1935/2004
- Window Bond: PET-to-board adhesion tested to 5N/25mm peel strength; no window detachment after ISTA 3A transit test
- Auto-Bottom Integrity: Bottom loaded to 150% of rated capacity — no failure; 100% QC sampling per production batch
- Print Registration: Color-to-color registration within ±0.1mm; die-cut to print registration within ±0.3mm
- Flat Ship: Cartons ship flat; no pre-assembly required; shelf life 12+ months in climate-controlled storage
- Free pre-production sample — 7–10 working days
Factory
- 22 years manufacturing experience (founded 2003)
- 18,000 sqm factory (10,000 sqm main + 8,000 sqm smart factory)
- KBA Rapida 105 4-color + Heidelberg Speedmaster CD 102 7+1 UV
- 3 automatic folder-gluers with inline quality inspection
- Dedicated window-patching machine for PET window application
- Export to 40+ countries globally
- Daily output: 1.7 million boxes total
FAQ
Q: What is the minimum order quantity for custom folding cartons?
A: Standard MOQ is 1000 pcs. For cartons with hot foil stamping, embossing, or multi-color spot UV, MOQ is 2000 pcs. Free pre-production sample — 7–10 working day turnaround, freight collect.
Q: How quickly does the auto-bottom erect during assembly?
A: Each carton pops open and locks in under 2 seconds — simply squeeze the sides and the bottom automatically locks. No manual folding, no tape, no glue required. This design is ideal for high-volume production lines and contract packagers.
Q: Can the carton be food-safe for direct food contact?
A: Yes. We offer food-grade SBS (solid bleached sulfate) board that complies with FDA 21 CFR for direct food contact. For EU markets, migration testing per EU 1935/2004 is available. The PET window is also food-grade. For products requiring a barrier, we can add a PE or PLA coating.
Q: Do you offer sustainable or eco-friendly material options?
A: Yes. We offer FSC-certified board, kraft-back board with 100% recycled content, and PLA (compostable) windows instead of PET. Aqueous coating can replace plastic lamination for fully plastic-free packaging. Soy-based inks are standard for all our offset printing.
