Crafted from premium 100% virgin wood pulp or FSC-certified recycled pulp, this black cardboard utilizes deep-layer pulp dyeing technology to achieve permanent, non-fading black pigmentation on both sides.

Core Physical Properties

Hard stiffness index: ≥18 N·m/g (ISO 5628 standard)
Folding resistance: >120 double folds (MIT tester, 0.5kg tension)
Surface Performance:
Smoothness: ≤2.5 μm (Parker Print-Surf method)
Runnability score: ≥95/100 (compatible with 12,000+ sheets/hour die-cutting)
Surface Integrity:
Zero fiber lifting during high-speed finishing
Certifications
Compliant with ISO 9001:2015, ISO 14001:2015, SGS non-toxic verification, and FSC Recycled (minimum 85% post-consumer fiber).