White Cardboard vs Grey Back Board: Which is Right for Your Packaging?
When sourcing paperboard for packaging, one of the most common questions buyers face is: should I choose white cardboard or grey back board? The answer depends on your product, budget, printing requirements, and food safety needs.
In this comprehensive guide, we compare white cardboard (also called SBS, FBB, or coated white board) with grey back board (also called WLC, white lined chipboard, or GT) across every important dimension cost, stiffness, whiteness, printability, food safety, and typical applications.
1. What is White Cardboard?
White cardboard also known as Solid Bleached Sulfate (SBS) board, Folding Box Board (FBB), or coated white board is made from 100% virgin bleached chemical pulp. It is white throughout the entire thickness of the board, with a smooth coated surface optimized for high-quality printing.
Key Characteristics:
- Raw Material: 100% virgin bleached wood pulp (softwood + hardwood blend)
- Color: White throughout (both sides)
- Coating: Typically 1-2 layers of clay coating on top side
- Reverse Side: Same white appearance as front
- GSM Range: 200 - 450 gsm
- Thickness: 0.3mm - 0.8mm
- Brightness: 80-92% ISO
Advantages
- Highest whiteness and brightness
- Excellent print surface (smooth, consistent)
- Superior stiffness-to-weight ratio
- Food-safe (FDA compliant grades available)
- White reverse side ideal for internal visibility
- Consistent quality with minimal variation
Disadvantages
- 20-35% more expensive than grey back
- Higher environmental footprint (virgin fiber)
- May be over-engineered for simple packaging
2. What is Grey Back Board?
Grey back board also known as White Lined Chipboard (WLC), Grey Board, GT (Grey back Testliner), or recycled paperboard has a white-coated top layer with a grey or light brown core made from recycled fibers. It is the workhorse of the packaging industry for cost-sensitive applications.
Key Characteristics:
- Raw Material: Recycled fiber core with bleached white top layer
- Color: White top surface, grey/brown reverse
- Coating: Thin white coating on top side only
- Reverse Side: Grey or light brown (unbleached recycled fiber)
- GSM Range: 250 - 600 gsm
- Thickness: 0.4mm - 1.0mm
- Brightness: 70-80% ISO (top side only)
Advantages
- 20-35% lower cost than white cardboard
- Made from recycled content (eco-friendly)
- Available in higher thicknesses and GSM
- Adequate print quality for most applications
- Good stiffness at higher GSM
- Widely available from multiple mills
Disadvantages
- Lower whiteness and brightness
- Grey/rough reverse side (not suitable for interior visibility)
- Lower stiffness at same GSM as white board
- Limited food contact compliance
- Surface may have minor imperfections from recycled content
- Less consistent quality between batches
3. Side-by-Side Comparison
| Property | White Cardboard (SBS/FBB) | Grey Back Board (WLC/GT) |
|---|---|---|
| Base Material | 100% virgin bleached pulp | Recycled fiber + white top layer |
| Whiteness (ISO) | 80-92% | 70-80% (top only) |
| Reverse Side Color | White (same as front) | Grey or light brown |
| Surface Smoothness | Excellent (Bendtsen 50-150 ml/min) | Good (Bendtsen 150-400 ml/min) |
| Print Quality | Excellent fine details, vibrant colors | Good suitable for most commercial printing |
| Stiffness (Taber, 350gsm) | 8-12 mNm (MD) | 5-8 mNm (MD) |
| Cost per Ton (2026) | $1,200 - $1,500 | $800 - $1,100 |
| Food Contact Safe | Yes (FDA/LFGB grades available) | Limited (not for direct contact) |
| FSC Certified | Available | Available (recycled content) |
| Recycled Content | 0% (virgin fiber) | 70-100% |
| Typical GSM Range | 200-450 gsm | 250-600 gsm |
| Common Grades | SBS, FBB, GC1, GC2 | WLC, GT, GD, GZ |
4. Cost Analysis: White Cardboard vs Grey Back Board
Price is often the deciding factor. Here is a detailed cost comparison for common packaging scenarios:
| Scenario | White Cardboard | Grey Back Board | Savings with Grey Back |
|---|---|---|---|
| Per ton (350gsm) | $1,350 | $950 | ~30% |
| Per sheet (700x1000mm, 350gsm) | $0.33 | $0.23 | ~30% |
| 10,000 folding cartons (small box) | $3,300 | $2,300 | $1,000 |
| 50,000 folding cartons (medium box) | $12,500 | $8,750 | $3,750 |
| 100,000 folding cartons | $22,000 | $15,400 | $6,600 |
5. Applications: Which Board for Which Product?
Best Uses for White Cardboard (SBS/FBB)
Cosmetic Boxes
Premium appearance required. White interior for product presentation. High-quality printing for brand imagery.
Pharmaceutical Packaging
FDA compliance required. White interior for clean appearance. Excellent print surface for small text and barcodes.
Food Containers
Direct food contact approved grades. White interior visible when opened. Moisture-resistant coating available.
Chocolate & Premium Confectionery
Food-safe with premium feel. Excellent for foil stamping and embossing. High whiteness enhances food appearance.
Perfume & Luxury Goods
Highest quality printing surface. Consistent color reproduction. Supports specialty coatings and finishes.
Paper Cups & Plates
Food-grade cupstock for beverage cups. White interior for clean appearance. PE or PLA coated for liquid resistance.
Best Uses for Grey Back Board (WLC/GT)
Shoe Boxes
Cost-effective for high-volume production. Grey interior is acceptable. Sufficient strength for stacking.
Garment & Textile Packaging
Large boxes with low cost requirement. Good print surface for branding. Recycled content appeals to eco-conscious brands.
Electronics Packaging
Protective packaging for devices. Cost-efficient for inner boxes. Adequate stiffness for product protection.
Dry Food Secondary Packaging
Cereal boxes, pasta cartons. No direct food contact needed. Economical for high-volume consumer goods.
Toy Packaging
Colorful printed boxes with moderate quality needs. Cost-effective for seasonal products. Good for retail display.
Industrial & Shipping Packaging
Protective packaging inserts. Internal packaging where appearance not critical. Maximum cost efficiency.
6. Stiffness and Structural Performance
Stiffness is critical for packaging that needs to hold its shape and protect its contents. Here is how the two materials compare:
- At the same GSM, white cardboard is 30-50% stiffer than grey back board because virgin fibers are longer and stronger than recycled fibers.
- To match stiffness, you typically need to use grey back board that is 50-80 gsm heavier than the equivalent white cardboard.
- For tall packages (like bottle cartons), the extra stiffness of white cardboard allows for thinner board, reducing total packaging weight.
- For short, wide boxes where stacking strength matters less, grey back board at higher GSM can be a cost-effective alternative.
7. Printing and Graphics Comparison
| Print Quality Factor | White Cardboard | Grey Back Board |
|---|---|---|
| Color Vibrancy | Excellent | Good |
| Fine Detail (6pt text) | Crisp | Adequate |
| Halftone Reproduction | Smooth | Slight dot gain |
| Metallic/UV Inks | Excellent adhesion | Good adhesion |
| Foil Stamping | Recommended | Possible with caution |
| Embossing | Deep, clean relief | Moderate relief |
| Overprint Varnish | Uniform finish | May show variation |
| Reverse Side Printing | Possible (white surface) | Not recommended (grey surface) |
8. Food Safety and Certifications
Food contact compliance is a critical differentiator between these two board types:
- White cardboard (SBS/FBB): Available with FDA (US) and LFGB (EU) certifications for direct food contact. Virgin fiber ensures no migration of contaminants from recycled content.
- Grey back board (WLC): Limited food contact grades exist but are generally restricted to dry, non-greasy foods (like cereal boxes) where the food is in a sealed inner bag. Recycled content increases the risk of mineral oil migration.
- FSC Certification: Both board types can be FSC certified white cardboard uses virgin fiber from responsibly managed forests, while grey back board uses recycled content.
9. Environmental Considerations
Sustainability is increasingly important for packaging decisions:
| Environmental Factor | White Cardboard | Grey Back Board |
|---|---|---|
| Recycled Content | 0% (virgin fiber) | 70-100% |
| Carbon Footprint | Higher (virgin pulp processing) | Lower (recycled processing) |
| Recyclability | Fully recyclable | Fully recyclable |
| Biodegradable | Yes | Yes |
| FSC Options | FSC Mix / FSC 100% | FSC Recycled |
| Water Usage | Higher (pulping process) | Lower (recycling process) |
Our Recommendation: If sustainability is a priority for your brand, consider FSC-certified white cardboard from responsibly managed forests, or FSC Recycled grey back board. Both contribute to a circular economy through full recyclability.
Need Help Choosing the Right Board?
Salon Paper supplies both white cardboard and grey back board. We help you select the optimal material for your specific packaging application.
Free material consultation & sample sets
FDA & FSC certified options available
Competitive factory pricing from Ningbo, China
📧 Email: [email protected]
Product Comparison References
- Salon Paper supplies white cardboard (SBB/SBS, 200-450gsm) and professional comparison data
- Industry standards for board stiffness, whiteness, and folding endurance testing
- Suitable for cosmetic packaging, pharmaceutical cartons, and gift box applications
- FSC-certified fiber sources with competitive pricing from Chinese mills
Quick Answers
What is grey board?
Grey board is board with a core made from recovered fibre, so the reverse side is grey or light brown. It is also sold as grey cardboard, white lined chipboard (WLC) or GT, and costs 20-35% less than virgin white cardboard.
What is the difference between white cardboard and grey back board?
White cardboard (also called SBS or solid bleached sulfate board) is made from 100% virgin bleached pulp, white throughout, and offers high whiteness, smooth surface, and excellent printability. Grey back board (also called WLC or white lined chipboard) has a white-coated top layer with a grey recycled fiber core, making it more economical but with lower whiteness and stiffness.
Which is cheaper: white cardboard or grey back board?
Grey back board is significantly cheaper typically 20-35% less expensive than white cardboard. For 350gsm board, white cardboard costs approximately $1,200-1,500 per ton, while grey back board costs $800-1,100 per ton. However, white cardboard offers better stiffness-to-weight ratio, so you may be able to use a lighter weight.
Can grey back board be used for food packaging?
Yes, but with limitations. Food-grade grey back board must meet FDA or EU migration standards. However, because grey back board contains recycled fibers, it is generally not recommended for direct food contact. For primary food packaging (direct contact), white cardboard (SBS/FBB) is the safer and more compliant choice.
What is SBS board used for?
SBS (Solid Bleached Sulfate) board is used for premium packaging applications including: cosmetic boxes, pharmaceutical packaging, chocolate boxes, perfume cartons, food containers, and any application requiring high whiteness, excellent print quality, and direct food contact safety.
What is white lined chipboard (WLC) used for?
White lined chipboard (WLC) or grey back board is commonly used for: shoe boxes, garment boxes, toy packaging, electronics boxes, cereal cartons, dry food secondary packaging, and any application where cost efficiency is a priority and the inside of the package does not need to be white.