Product Overview
Bincai’s kraft paper cake box combines eco-credentials with bakery-grade functionality. The FSC certified kraft board provides natural rustic charm, while the die-cut PET window showcases your creations — cakes, cupcakes, pastries, or cookies. The auto-lock bottom assembles in under 3 seconds with no tape or glue. Printed with soy-based inks for full compostability. An optional compostable PLA window film makes the entire box biodegradable. MOQ starts at 1,000 units, produced in our 18,000 sqm Foshan facility. 22 years of sustainable packaging expertise.
Manufacturing Specifications
- Press: KBA Rapida 105 4-color offset press for full CMYK branding — soy-based inks throughout
- Board: 350gsm FSC certified kraft board — natural brown or bleached white; alternative 400gsm for larger sizes
- Window: Die-cut with 0.2mm PET film or compostable PLA film (ASTM D6400 certified for industrial composting)
- Printing: Soy-based flexo (1-2 color) for economy runs or full CMYK offset for photo-quality branding
- Ink: Vegetable-derived soy inks — compliant with EN 71-3 (heavy metals), FDA 21 CFR for indirect food contact
- Bottom: Auto-lock crash-lock mechanism — assembles in under 3 seconds with zero tape or adhesive; also available as tuck-bottom or 1-2-3 collapsible base
- Adhesives: Water-based emulsion adhesives — VOC-free, food-safe formulation
- Food Safety: Full migration testing available; soy inks certified for indirect food contact per EU Regulation (EC) No 1935/2004
- Eco Features: FSC chain-of-custody, fully recyclable kraft board, compostable PLA window option, soy-based inks, water-based adhesives
- Daily Output: 220,000+ cartons (post-2025 smart factory expansion to 18,000 sqm)
- Certifications: ISO 9001:2015, FSC Chain-of-Custody, Soy Ink Certification
Applications
|| Product Type | Example | Recommended Size | Window Style |
||—|—|—|—|
|| Whole Cakes | 6-inch to 12-inch layered cakes, cheesecakes | 250×250×150mm | Large top window |
|| Cupcake Sets | 4-pack, 6-pack, 12-pack with individual wells | 200×150×80mm | Multi-window grid |
|| Pastries | Croissants, danishes, tarts, pies | 180×130×60mm | Side window |
|| Decorated Cookies | Holiday cookies, macarons, biscotti | 150×120×40mm | Full top window |
|| Artisan Bread | Sourdough loaves, brioche, banana bread | 300×150×120mm | Kraft-only (no window) |
|| Multi-Item Combos | Cake + cupcake + pastry variety boxes | 350×250×150mm | Custom die-cut window |
Customization Options
- Size: Custom from 150×150×80mm (4 cupcakes) to 400×300×180mm (full cake + accessories)
- Window: Square, round, oval, heart-shaped, arched, or fully custom die-cut shape — multi-window arrays for cupcake sets
- Window Film: Standard 0.2mm PET (crystal clear) or 0.2mm compostable PLA film (ASTM D6400 / EN 13432 certified)
- Printing: 1-2 color flexo (economy) or full CMYK offset (premium) — all soy-based inks
- Bottom Style: Auto-lock crash-lock (fastest assembly), tuck-bottom (traditional), 1-2-3 collapsible (flat-shipping)
- Add-ons: Die-cut carrying handle, ribbon tie closure, insert tray with individual product wells, compartment dividers
- Surface: Natural kraft (rustic), bleached kraft (clean), or clay-coated kraft (smooth printing surface)
- MOQ: 1,000 units (standard sizes), 3,000+ (full custom tooling)
Production Quality
|| QC Stage | Standard | Method |
||—|—|—|
|| Board Grammage | ±3% tolerance | Digital balance, ISO 536 |
|| Window Film | Optical clarity ≥90%, thickness 0.2mm ±0.02mm | Spectrophotometer + micrometer |
|| Window Bond | Peel strength ≥4.0 N/cm² | Tensile tester per ASTM D903 |
|| Printing | ΔE ≤3 color consistency, soy ink food-safety cert verified | Spectrophotometer + batch documentation |
|| Auto-Lock Test | 100% sample — must lock within 3 seconds, 10-cycle durability | Manual cycle test per AQL sampling plan |
|| Food Safety | No hazardous chemical migration | Per EU 1935/2004 + FDA 21 CFR |
|| Finished Goods | AQL 2.5 major / AQL 1.5 critical | ANSI/ASQ Z1.4 sampling |
Why Bincai?
Bincai’s integrated kraft packaging line — from FSC certified board sourcing through in-house die-cutting, window patching, and soy-ink printing — eliminates multi-vendor food-safety risk. With 22 years of eco-packaging expertise, our 18,000 sqm facility produces over 220,000 cartons daily while maintaining ISO 9001:2015 quality systems. The optional PLA compostable window (ASTM D6400 / EN 13432 certified) makes the entire box industrially compostable — differentiating your bakery brand in sustainability-conscious markets.
Factory Facts: Founded 2003 | 22 years experience | 18,000 sqm (10,000 + 8,000 smart factory) | 220K+ cartons/day | KBA 1050 offset | ISO 9001 & FSC certified | Soy ink certified | Foshan, Guangdong, China
Lead Time: 8–12 days standard; 5–7 days rush. Flat-packed for efficient container loading — 40-50% freight savings vs assembled boxes.
