Douglas-fir veneer: green veneer grades, layup loss, and green veneer and plywood recovery

Production problems faced by plywood manufacturers on a continuing basis are losses in volume from the veneer block to finished panel and recovery of veneer by grade from graded green veneer. Volume from the block to finished dry panel volume was compiled using a sample of 764 veneer blocks from throughout western Oregon. Veneer was sorted by green veneer grade at the clipper then resorted after drying by dry grade. Of the initial block volume, 75.6 percent was recovered as green veneer and 15.7 percent and 8.7 percent went to chips and peeler core, respectively. Of the green veneer, 78 percent was recovered as finished panel and 22 percent was lost to shrinkage and trim. Overall, 59 percent of the block volume was recovered as finished panels. Nineteen percent of the CD sort up-graded to A or B patch. Of the green AB grade, 96 percent stayed:in either grade A or B when dried.

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