Multi-Ply Folding Boxboard

Surface Calibration

Mineral pigment coatings applied to the top layer seal microscopic pores and create a uniform receptive plane for offset lithography or gravure printing. Calendering nips compress the fibrous matrix to regulate smoothness and ink absorption, preventing mottling or dot gain across large solid areas. Surface sizing restricts fluid penetration so hydrophobic barriers remain intact during subsequent converting operations like die cutting and gluing.

Conversion Tolerance

Dimensional stability under varying relative humidity prevents register errors during multi color print runs and reduces jamming on high speed carton erectors. Internal ply bond strength withstands the sudden mechanical stresses imposed by rotary cutting dies and aggressive folding fingers. Residual moisture limits dictate dimensional equilibrium, preventing curl or board distortion before filling machines pack the finished containers.