The deep amber tones found in Oak Backa have been enhanced by charcoal knots and other naturally occurring effects such as minor cracks. Another authentic design feature that Oak Backa offers are the occasional saw marks which bring out the natural appearance. Each board is hand brushed to bring out the organic grains and knots which differ in size on the natural planks. We recommend an extra coat of Kahrs Satin Oil Matt Appearance is applied after installation of this oiled floor. This will enhance the flooring finish and help seal the joints against ingress of dirt and moisture.