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Grade I (B)


  
Selected one-piece face generally light and even in color. Intended for natural finish. The majority of Grade B veneers are the equivalent of American one-piece select White birch faces.


Categories of defects Permissible amount of defects
Pin knots light Permitted with total quantity not more than 3 per sq. m
Sound intergrown knots Permitted up to an individual maximum diameter of 15 mm
with total quantity not more than 5 per sq. m
Other knots Permitted up to an individual maximum diameter of 6 mm
with total quantity not more than 3 per sq. m
Knots and knot holes repair Not permitted
Closed checks Permitted for an individual maximum length up to 200 mm and in number up to 2 per meter of a panel width
Open checks Not permitted
Irregularities in the structure of the wood Permitted
Hearth and discoloration No more than 5% of the surface
Defects at the edges due to sanding or sawing Permitted up to 2 mm from the edge
Glue penetration Not permitted
Sanding through Not permitted
Veneer overlapping in inner plies Not permitted