| abstract |
The present invention provides a wood cement board having an acute angle and deep concavo-convex design surface on the surface, and in which cracks are unlikely to occur in a curing curing process, a drying process and a transporting process. The surface has an uneven design surface, the length from the top of the convex portion to the back surface is 9 mm or more, and the length from the top of the convex portion to the bottom point of the concave portion is 2 mm or more and the convex Less than half the length from the top of the part to the back surface, the average specific gravity of the whole wood cement board, and the specific gravity of the convex part and the concave part are each 1.1 or more, and the specific gravity of the convex part and A wood cement board, wherein the difference in specific gravity of the recesses is less than 0.1. [Selection] Figure 3 |