SGK Nordic SIA – Birch Plywood Supplier
SGK NORDIC

Plywood defects classification

Pin knot

Pin knot

Sound knot

Sound knot

Partially intergrown knot

Partially intergrown knot

Intergrown knot

Intergrown knot

Black knot’s annual rings

Black knot’s annual rings

Loose knot

Loose knot

Bark inclusion

Bark inclusion

Close shake

Close shake

Open shake

Open shake

Biological damage (wormholes)

Biological damage (wormholes)

Overlap

Overlap

Glue stain

Glue stain

Face veneer oversanding

Face veneer oversanding

Warping

Warping

Hollow

Hollow

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