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SVEZA Interior and Exterior Plywood grades Defects Part 37: Wood structure defects (swirly grain, burls)

SVEZA Interior and Exterior Plywood grades Defects Part 37: Wood structure defects (swirly grain, burls) http://baza.sveza.ru/eng/index.php?pid=2&pr=2&id=8&def_id=8&full=1 Swirly grain is twisted or irregular grain formation. Burls are local twists of annual rings caused by knots or inbarks. Swirly grain, bud traces, and burls are not measured. Their occurrence is considered as …

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