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The 2025 Sappi North America – Sustainability Highlights follow our alignment with the UN SDGs, where we’ve made progress, where we have more work to do and why the discipline of measuring both is what sets us apart.

Web weave issues during and after roll splices stem from tension disruptions, misaligned splices, or web slack, causing web flutter, oscillation, and waste.

Mechanical ghosting in web offset printing results from blanket piling, uneven tension, and delayed blanket release, especially on gloss coated papers.

Reverse-side embossing results from uneven blanket release, high ink coverage, and moisture differential, causing web puckering and distortion.

Blistering on coated web heatset printing causes bubbles from trapped moisture and solvent, especially on heavy, sealed, dark ink coverage.

Web paper absorbs or loses moisture, causing size changes mainly across the grain, especially after printing due to lower moisture content in web paper.

To prevent ink pick and streaking in heatset web printing, ensure proper ink solvent flash-off by maintaining adequate dryer temperature, web cooling, and chill-roll water circulation.

Paper whiteness measures the balance of reflected light across the visible spectrum, with CIE whiteness (ISO 11475) being most common.

Paper brightness is measured via three methods: TAPPI T 452/GE (directional, 45/0°), ISO 2470-1 (diffuse, 0/0°), and ISO 2470-2 (diffuse, D65 UV-rich).

Streaky white paper dust on blankets results from web drag over stationary objects or high friction in turn-bar systems, especially with soft coated paper.

Wet ink setoff occurs from slow ink/dry times, high humidity, improper paper conditioning, static electricity, excessive heat, tight joggers, high pile, insufficient spray powder, or handling.

High-force blanket release causes paper distortion, misregister, gripper slip, curl, tail-pick, and dot slur by creating shearing stress, especially with smooth-coated paper and high ink tack.