Plywood QC Inspection Checklist : Part 41 Three step lay-up process
Three step lay-up process
Most plywood (import or domestic) is produced using a two-step process, that is, the platform is made, calibrated (sanded to thickness) and then the face/back is laminated & finish sanded. We have added a step: our platforms are made without the final cross-bands, calibrated, then the cross-bands are added, the products is repaired and then painted, then the face/back is aminated and then finished sanded. The reason for this extra step is to better control thickness tolerance and to eliminate (as much as possible) the waviness inherent to veneer core product. The platform is painted (as it is with most mills) to provide more even color to the finished panel.