BCTMP cores lower basis weight for target stiffness, but elevated humidity plasticizes lignin, accelerating score memory loss and risking carton wall bulge.
Maintain crease depth ratios between 0.55 and 0.65 to induce internal ply shear, reducing panel springback torque for clean high-speed package ejection.
Optical penetration depth correction in continuous board web profilometry mathematically compensates for subsurface scattering to ensure true mechanical caliper.
Modifying creasing matrix channel width and male rule tip radius prevents polymer film elongation cracking and maintains gas barrier integrity across folded scores.
Dynamic contact angle decay within 10 to 100 milliseconds governs liquid holdout and adhesion on paperboard, requiring tight surfactant diffusion control.
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