Oak Super Country Bone. White Brushed 4-Side Bevelled Natural oiled Character: It is characterized by the knots, cracks, and the prominent textural and colour variations resulted from the discolorations near the pith. Strongly rustic material with a lot of knots. A flame pattern is permitted. Knot: 5 – 6 healthy, cracked, wing knots – even edge knots – are permitted in each stripe, up to a diameter of 100 mm. Fallen-out knots are permitted, up to 35 mm in diameter corrected by filling. Sapwood: Basically not specific, but healthy narrow sapwood is permitted in the width of 3-4 mm and length of 20-30 cm. Inbark: permitted in the width of 3 mm and length of 50 cm. Crack: permitted max. in the width of 10 mm and max. length of 400 mm corrected by filling. Filling: small filling gaps, small holes appeared during the surface treatment after filling are permitted
According to the EN 13489 standard, 3 % of different grade than indicated is acceptable.