SVEZA Interior and Exterior Plywood grades Defects Part 31:Sound discoloration (false heartwood)
Sound discoloration (false heartwood)
False heartwood is dark unevenly colored heartwood separated from sapwood with a dark (less often light) margin, has the same hardness as the surrounding wood. Its boundary usually does not coincide with annual rings.
|False heartwood is measured by the length and the width of the area occupied, or is expressed as a percentage of the total plywood sheet area.|