solidboard

Solidboard, also called solid paperboard, is a rigid, single-ply sheet material fabricated from wood pulp fibers. Unlike corrugated or laminated boards, it has no fluted core or multi-layer sandwich, offering a uniform thickness and a smooth, printable surface. It is used where rigidity and printability are important, including folding cartons, book covers, art mounting boards, and specialty packaging.

Manufacture: Solidboard is produced by forming a dense pulp sheet and pressing it under heat to create a thick, stiff board. The fiber source may be chemical pulp, mechanical pulp, recycled fibers, or blends. Grades may be bleached (solid bleached board, SBB) for a bright white surface or unbleached (SUB). Surface finishes include coated or uncoated, with calendering used to improve flatness and print quality.

Properties: The board offers high rigidity relative to its thickness, good dimensional stability, and a smooth surface suitable for high-quality printing. It can be sensitive to moisture and standard coatings can affect recyclability. Thickness commonly ranges from about 0.3 mm to 2.0 mm, with heavier boards used for cartons and cases.

Applications: Packaging and cartons for consumer goods, luxury packaging, bookbinding boards and covers, display and mounting boards, and crafts. Some grades are designed for food-contact packaging, while others prioritize art or print performance.

Environmental and recycling: Many solidboards are recyclable and made from recycled fibers, though coatings and barrier layers can influence recyclability. Suppliers may offer certifications related to chain of custody or fiber sourcing.