Non Contact Laser Profiling Verification Baseline Setup in Board Converting
Establish an isolated vacuum datum and calibrate 405-nanometer sensors to eliminate sub-surface scattering errors during board crease verification.
Non-Contact Profilometry
Surface Analysis
Measurement method that utilizes light to map the three-dimensional topography of a substrate without physical contact. Non-contact profilometry captures high-resolution data on surface roughness and coating uniformity along with the depth of embossed or creased features. This technique is preferred for delicate or wet surfaces where a physical stylus would damage the material or provide inaccurate readings.
Technical Execution
Sensors emit a beam of light that reflects off the paperboard surface to calculate the exact distance to every point on a defined grid. The resulting data set creates a digital elevation model that reveals microscopic peaks and valleys. In the context of printing, this allows for the precise evaluation of paper smoothness and the thickness of applied ink films.
Because the system is digital, the results can be compared against previous production runs to detect subtle drifts in quality.
Quality Control
Converting plants use these profiles to inspect the quality of scores and the sharpness of die-cut edges. Accurate mapping of the surface texture helps in predicting how a board will accept specialized finishes like hot foil stamping or spot UV coatings. It also assists in identifying defects like pinholes in barrier layers or unevenness in the calendering process.
This data provides an objective basis for rejecting batches that do not meet the strict smoothness requirements of high-end cosmetic or pharmaceutical packaging.