A rectified tile has all its edges mechanically finished to achieve a more precise dimension.
Unlike a typical factory-edged tile, a rectified tile is created by cutting the tile to size after the firing process. This creates precise 90 degree angle smooth edges.
As a result, the tiles can be laid with consistent grout joints. Most tiles, Porcelain and Ceramic can vary in size (up to 1.0%) after the firing process but this can be substantially minimised by grinding the tile after firing.