| 摘要 |
A coating method of building board having convexoconcave in surface comprises the first process that coating is supplied and stocked in a tank installed above on a transportation line which transports the building board with making surface of the building board into the upper position, the second process which the building board is passed under the tank, and coating is flowed down like waterfall by weight of the coating from a drain hole which is installed in the lower end of the tank, and it coats the whole surface and the whole edge of building board with coating enough, wherein width of the drain hole in vertical direction to travelling direction of the building board is wider than width of the building board in vertical direction to travelling direction, and amount of coating to the surface of the building board is 1200-1800 g/m2.
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