Prime SD/BIS

Face A:

• No defects, allowed sound clear knots up to 10-12 mm diameter
• No sapwood
• Elements composed in harmony of blend and grain, with possible light discolorations and light darker shades allowed;
• Mix of grains crown cut / quarter cut / half crown cut

Face B:

• Eventual traces of sapwood are allowed up to 20% of surface
• Eventual sound knots up to 25 mm diameter are allowed
• For quality C, sapwood is allowed without limitations, and knots can reach 40 mm diameter