Key Technical Specifications
Material Composition:
Constructed from recycled wastepaper pulp, ensuring environmental sustainability and compliance with global eco-standards .
Classified as double grey board (both sides grey), distinguished from single grey or coated variants .
Physical Properties:
Thickness: 1.5mm (tolerance ±0.05mm), measured under standard pressure conditions (0.1kg/cm²) .
Stiffness: High rigidity achieved through compacted fiber layers, tested via QB/T 4759-2014 standards using the static bending method (ASTM D638 equivalent) . Typical transverse stiffness values range from 140–9,852 mN·m, ensuring resistance to bending and warping .
Density: 0.62–0.65 g/cm³, contributing to its load-bearing capacity .
Moisture Content: 7–9%, optimized to prevent swelling or delamination in varying environmental conditions .
Surface Finish:
Smooth, uncoated grey surfaces on both sides, suitable for direct lamination with fabrics, papers, or leather. The natural texture minimizes ink absorption, enhancing print clarity when combined with pre-printed cover materials .
Applications in Hardcover Book Production
Book Cover Structure:
Serves as the core substrate for hardcover book jackets, providing structural support to protect interior pages. The 1.5mm thickness is standard for trade books, textbooks, and luxury publications .
Customizable to 8.5'' x 11'' (A4 equivalent) or other sizes via die-cutting, ensuring precise fit for standard book formats .
Lamination and Binding:
Compatible with adhesive lamination processes using PVA or PUR glues. The grey backside offers a neutral base for adhering endpapers or decorative materials without compromising the cover's integrity .
Resistant to edge cracking during folding and rounding, a critical requirement for spine reinforcement in case-bound books .
Design Flexibility:
Enables embossing, debossing, or foil stamping due to its uniform surface. The natural grey tone can be paired with contrasting laminates to create visually striking covers .
Industry Standards and Certifications
Quality Compliance:
Manufactured in accordance with QB/T 4759-2014 (China's national standard for grey board), ensuring consistency in thickness, stiffness, and moisture resistance .
Meets international requirements for recycled content, with many suppliers offering FSC®-certified variants for sustainable sourcing .
Environmental Performance:
Recyclable and biodegradable, aligning with global trends toward circular economy practices. Production processes often use minimal chemical additives, reducing ecological impact .
Market Trends and Supplier Considerations
Sustainability Demand:
Growing preference for eco-friendly materials has driven adoption of recycled grey boards. Publishers increasingly seek suppliers with FSC® certification or PEFC accreditation to meet consumer expectations .
Customization Options:
Suppliers offer value-added services such as pre-cut sheets, moisture-resistant coatings, or acid-free treatments for archival-quality books .
Price Range: Costs vary by region and volume but typically range from $380–$550 per ton for bulk orders of 1.5mm double grey board .
Supplier Selection Criteria:
Prioritize suppliers with proven expertise in bookbinding materials, ensuring consistent stiffness and surface smoothness.
Request samples to test lamination compatibility and long-term durability under stress .
Conclusion
The 1.5mm Grey Board Two Side Grey Back Stiffness is a cornerstone material in modern hardcover book manufacturing, valued for its strength, sustainability, and versatility. By combining recycled fibers with rigorous quality standards, it delivers reliable performance for both mass-market and premium publications. As the publishing industry evolves toward greener practices, this product exemplifies the balance between functionality and environmental responsibility. For optimal results, collaborate with certified suppliers who can provide tailored solutions to meet your specific design and production needs.
For further details or supplier recommendations, contact industry leaders such as Smurfit Kappa, Schmedt, or Century Paper Group, which specialize in high-performance bookbinding materials.
Place contact us
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