Polished porcelain tiles are given this appearance by polishing the surface with a hard grinding stone.
During the polishing process, microscopic pores open up on the surface of the tiles. These pores reflect light differently and therefore you can expect that sometimes you will see a variation in shininess appearing as a slight haze on part of the surface of the tiles under certain light conditions. In the same way, slightly varying thicknesses of sealer may be perceived as variations in shininess. These are normal characteristics of polished porcelain and should be expected.
In the gallery below, Onyx Breccia 16x32, Alpine White 32x32 and Amazonia Perla 24x24 are examples of polished porcelain high gloss floor tiles.
Glossy Finish Porcelain
Glossy finish is created by the glaze process to give the tiles a shiny appearance. These tiles can be used on floors and walls.
In the gallery below, Gorey Cream Glossy 24x24 and Nairobi Glossy 24x24 are examples of glossy finish porcelain tile.
Leviglass is a highly glossy finishing process. Helios 15x30 in the gallery below is an example of the Leviglass polishing process.
>> See Porcelain Tile That Looks Like Marble: Venato and Helios