Laser Triangulation Topography Principles for Boxboard Surface Evaluation
Laser triangulation delivers uncompressed 3D areal topography data, isolating micro-roughness and void volumes that drive print quality across coated boxboard.
Kurtosis
Distribution Shape
Measured profile height variation describes kurtosis across corrugated board surfaces during high speed printing operations. Statistical peaks evaluate how sharply outlier caliper values cluster near the mean compared to normal Gaussian distributions. Flute compression resistance drops when extreme caliper spikes exceed standard deviation thresholds on commercial linerboards.
High peak values indicate frequent localized caliper surges that fracture micro flutes during press nip compression.
Caliper Variance
Press nip pressure distributions react directly to localized caliper spikes inside corrugated stacking processes. Board density anomalies alter peak sharpness by compressing excessive fibre masses unevenly across flat sheet areas. Machine operators monitor kurtosis readings to detect micro structural failures within corrugated mediums before converting lines jam.
High peak values reduce stacking strength by concentrating box compression forces onto isolated rigid high points.
Optic Smoothness
Surface level smoothness measurements depend entirely on statistical flatness across coated paper substrates. Manufacturing plants use kurtosis values to quantify random paper grain variations that scatter incident light during high speed optical sorting. Paper mills adjust wet end refining parameters to reduce extreme caliper outliers and stabilize final print gloss consistency.
Surface scattering increases when high kurtosis metrics reveal excessive micro pitting across fine art printing stocks.