White Top Testliner Board (WTL) is a durable and cost-effective paperboard consisting of a white-coated top layer and a brown/undyed back layer. This test liner board combines the smooth, high-quality printability of a white surface with the structural strength and rigidity provided by recycled fibers in the underlying layers. This makes WTL paper an excellent choice for packaging that requires a clean, premium appearance while maintaining practical performance and affordability.
WTL is widely used in industries such as food packaging, consumer goods, electronics, and general retail, where both visual appeal and functional durability are essential. It is suitable for applications like boxes, displays, and cartons that demand reliable stiffness and good converting performance.
China Paper offers a versatile range of WTL products, available in different grammages and finishes, to meet diverse packaging needs for strength, printability, and surface quality.
| Item | Details |
| Classification | White Top Testliner Board (WTL) |
| Basis weight | 125-235g |
| Brightness | 82±2% |
| Gloss | ≥40% |
| Size | 700×1000mm, 720×1020mm, Width ＞600mm or other custom size, etc. |
| Coating Type | Coated/Uncoated |
| Loading | 25 tons/40FT |
| Certificates | SGS, ISO, FSC |
When selecting between White Top Testliner (WTL) and White Top Kraft Liner, it is important to evaluate the balance between cost efficiency, structural performance, and end-use requirements.
White Top Testliner (WTL):
A cost-efficient linerboard with a white top surface layer designed for strong visual appearance and excellent printability. The base ply is manufactured from recycled fibers, making it a sustainable and economical solution. It is widely used for retail packaging, e-commerce boxes, and consumer goods applications where branding and cost control are equally important.
White Top Kraft Liner:
A high-performance linerboard made from virgin wood pulp, offering superior strength characteristics, including high bursting strength, compression resistance, and improved moisture resistance. It is primarily used in heavy-duty corrugated packaging, export cartons, and long-distance logistics applications where maximum durability is required.
| Feature | White Top Testliner (WTL) | White Top Kraft Liner |
| Fiber Composition | Recycled Fibers (Eco-friendly) | Virgin Wood Pulp |
| Strength & Durability | Moderate (Suitable for standard use) | Superior (Heavy-duty/High-strength) |
| Cost Efficiency | High (Economic & Versatile) | Lower (Premium pricing) |
| Surface Quality | Excellent (Smooth & High-brightness) | High (Consistent & Uniform) |
| Sustainability | High (Made from recycled content) | Moderate |
| Applications | E-commerce, retail cartons | Export, industrial packaging |
White Top Testliner Board (WTL) is a cost-effective packaging material that combines a printable white surface with strong recycled fiber backing for both visual appeal and structural support.
White Top Testliner Board is ideal for modern courier bags, offering an optimal balance of strength, print quality, and value. Its rigid base provides reliable protection during shipping, while the bright white surface ensures excellent print reproduction for branding and labels. This combination transforms plain shipping bags into effective brand touchpoints.
Branded e-commerce shipping bags
Retail delivery bags
Reusable postal mailers
The bright, printable white top layer provides an excellent surface for vibrant graphics and branding, enhancing shelf appeal for a wide range of products. Its good stiffness ensures boxes maintain their shape during transport and display.
Personal care and household product cartons
Electronics and small appliance boxes
Toy packaging and board game boxes
Promotional displays and shelf-ready packaging
Its strength, rigidity, and affordability make WTL an ideal material for protective yet presentable industrial packaging.
Small parts and hardware boxes
Light-to-medium weight shipping cartons
Internal dividers and fitments within larger boxes
WTL performs well in e-commerce supply chains, offering a balance of durability for shipping and a superior unboxing experience compared to standard brown corrugated materials.
Branded e-commerce shipping boxes
Subscription box packaging
Product mailers and multi-pack carriers
Produced under ISO and FSC Chain of Custody
Strict moisture control before packing
Uniform grammage tolerance and caliper consistency
Stable supply with full traceability
PE-wrapped for moisture protection
Four-corner protectors for shock resistance
Strong export pallets suitable for long-distance shipping
Stretch film wrapping or metal strapping available upon request
Fumigation-free pallets optional
WTL uses a white-coated top layer on a recycled fiber base for cost efficiency. FBB is made from 100% virgin pulp for higher bulk and premium quality.
Yes, both formats are offered with custom sizing.
Suitable for dry food outer cartons. Direct contact requires food-grade certification.
Excellent. The coated top layer ensures sharp printing and supports common finishing processes.
Typically 125–235 gsm.
Yes, White Top Testliner (WTL) is highly sustainable as its base layer consists of recycled fibers, reducing environmental impact while maintaining structural integrity.
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