PapVision – perfecting print quality

Automate your quality control – improve the realibility and precision of your measurements

PapVision is a measuring station that utilises robotics and machine vision to automatically evaluate quality aspects related to paper printability. The automated system reduces measuring variations and improves precision. Compared to quality control that relies on the human eye, the system also accelerates the process.

The results obtained from the measurements can be utilized by other automation and quality control systems in the mill. This allows quality control data to be shared throughout the organization and to be evaluated easily. The measuring parameters are adjustable and can be selected from the user interface. The graphical PapVision user interface runs on the Windows operating system. All the measurement modules are maintained by a single supplier.

PapVision measurement modules

Automated analysis of printed samples using a measuring station or a scanner

• Mottling
  • MottCam measurement using camera
  • MottScan measurement using scanner
  • Mottref mottling reference generator, electronically produced comparable samples scaled for the human eye
• Multires (dot gain) - multi-resolution analysis of printed color dots, micro-level printing quality measurements
• Heliotest - standard method
• Missing dots in freely selected areas
• Surface strength measurements: Picking, Delamination (surface breakage, wavy delamination), and Backtrapping
• Gloss

PapSurface topography measurements

Surface topography is a height map, which describes the surface shape, like peaks, valleys, pits and spikes. PapSurface meters provide surface topography in a non-contact and fast manner using shading information in images. In the online measurement, the measured phenomena are from micrometers to centimeters at web speeds up to 2000 m/min.

• At the paper machine
  • Paper topography: in unwinding, after coating, calendering
• At Tapio PMA
• Laboratory measurements: Measurement robot provides surface topographies from large areas with high resolution
• Topography analysis: Roughness, pits, coating defects, band-pass analysis …

Continuous R&D based on customer needs

Oy LabVision Technologies Ltd is a machine vision technology company that develops, manufactures and supplies measuring and analysis solutions for the pulp, paper, board, and printing industries. LabVision's solutions improve quality control and help minimize quality management costs.

The development of LabVision's measuring stations, PapVision and PapSurface, is based entirely on customer needs. They have been developed together with paper, board and printing industry companies as parts of research projects at Lappeenranta University of Technology.

LabVision continues to work together with Lappeenranta University of Technology and other leading universities in order to obtain the latest expertise for its customer-based R&D.