SVEZA Interior and Exterior Plywood grades Defects Part 20: Mineral streaks, sap stains (blue, colored sap stains), wood discoloration during storage

 

Mineral streaks, sap stains (blue, colored sap stains), wood discoloration during storage

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Mineral streaks, sap stains (blue, colored sap stains), wood discoloration during storage
Mineral streaks, sap stains (blue, colored sap stains), wood discoloration during storage

http://baza.sveza.ru/eng/index.php?pid=2&pr=2&id=16&def_id=16&full=1Mineral streak is wood blanching without disguising its structure.

Blue is gray sap stains with bluish or greenish shades.

Colored sap stains are orange, yellow, and pink (up to light purple), and brown sap colors.

Measured by the length and the width of the area occupied, or expressed as a percentage of the total plywood sheet area.

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