One piece sanded face with even color. No patches, voids or mineral streaks allowed.
BB Grade
One piece sanded face with generally even color. Slight pin knots and mineral streaks allowed. Open knots and defects are cut out and replaced with oval patches.
CP Grade
This is a fall down from BB with more patches on the face that may not always be matched for color. Splits less that 0.5 mm are allowed.
C Grade
Un-sanded face that allows patches, open knots and veneer splits.
NOTE: Russian Birch panels are a consistent specie throughout the panel (core and face and back veneer).
