Glazed Porcelain Wall Tile , Indoor Outdoor Porcelain Tiles Commercial

Vitrification
Porcelain tiles can be vitrified to reduce their porosity and increase their strength. Vitrified porcelain tiles are created by combining clay with other elements such as quartz, silica or feldspar under incredibly high temperatures. The vitrification process creates porcelain tiles that contain a glass substrate. The glass substrate gives the tiles a sleek appearance, provides added strength and makes the tiles water and scratch resistant. Vitrified porcelain tiles do not need to be re-sealed or glazed.

If you are working with new tiles, you can easily tell if a porcelain tile is glazed or not by looking at the side of the tile, or the underside. Glazing only partially covers the edge of a tile, and the bottom of the tile is a completely different color than the glaze on top.