SBS

Surface Performance

Coating weight directly dictates gloss development and ink trap efficiency during offset and gravure printing operations. Caliper stability under high moisture conditions prevents board curl during liquid packaging converting and subsequent filling line operations. Die-cutting stations require precise internal bonding strength to prevent ply separation along 90-degree creases on high-speed packaging lines.

Rigidity metrics determine stacking strength for folding cartons in transit, balancing caliper against weight to minimize fibre consumption.

Regulatory Compliance

Food contact regulations govern the allowable chemical additives used in wet end sizing and coating formulations for primary packaging applications. Mill certifications verify virgin fibre sourcing through chain of custody standards that trace wood inputs back to managed forests. Regulatory compliance frameworks demand strict limits on extractable heavy metals and optical brightening agents within food-grade packaging grades.

Paperboard destined for pharmaceutical markets requires adherence to strict heavy metal migration limits and microbiological purity standards.