| 摘要 |
PROBLEM TO BE SOLVED: To provide a building board which allows for discreet color difference between neighboring building boards and a discreet joint part.SOLUTION: The surface of a base material 1 is provided with a plurality of concave grooves 2 continuously extending in the longitudinal direction of the base material 1. The surface of the base material 1 is provided with many fine lines 4 approximately continuously extending approximately in parallel with the longitudinal direction of the concave grooves 2. The proportion of dark color lines 4a in the fine lines 4 formed at the concave grooves 2 is larger than the proportion of the dark color lines 4a in the fine lines 4 formed at other than the concave grooves. Part of the fine lines 4 formed at other than the concave grooves 2 are formed of dark color fine lines 4a having a color similar to that of the dark color fine lines 4a formed at the concave grooves 2. |
