Powder edge coating for ceiling tile

摘要

The edge of a ceiling tile adjacent the fissured or embossed face of the ceiling tile is provided with a powder coating. The ceiling tile is formed from a fibrous board which has an open pore structure, and powder is dusted on the edge of the ceiling tile and is mechanically held in the open pore structure of the ceiling tile. The powder coating covers the upper edge of the ceiling tile with a coating so as to eliminate the dark edge effect secured when two ceiling tiles are in position with their front planar surfaces not quite in the same plane.