(Face without visible surface defects, lamellas with or without brown
and redheart and sorted for homogeneous colour.)

Permitted features:

• solid wood sound knots
• isolated closed small knots up to Ø 3 mm
• sporadic discolorations or mineral spots, becoming visible after sanding
  (50 mm long and 3 mm wide)
• sporadic lamellas with diminishing redheart
• sporadic lamellas without redheart

The grading of the back side in non-visible areas will be discussed individually with the customer.