SVEZA Interior and Exterior Plywood grades Defects Part 13: Glue stain

SVEZA Interior and Exterior Plywood grades Defects Part 13: Glue stain

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Glue stain is a defect that looks like stripes and stains on the plywood surface as a result of glue penetration from the underlying glue line.

Defined as the total area of separate stains on the plywood surface ratio to entire sheet area.
Glue stain
Glue stain
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