There Are 3 Types of Ceramic Tile:Glazed,Unglazed and Porcelain

There are 3 types of ceramic tile: glazed, unglazed and porcelain. Understand them and you’re home free. Glazed ceramic tiles are coated with glass-forming minerals and ceramic stains. Typically, they have a matte, semi-gloss or high-gloss finish. They can offer better stain and moisture resistance than unglazed tile. Glazed tiles can also have different finishes and you should be aware of them for future considerations. High gloss finishes can be more slippery and scratches can become more visible, while matte or textured finishes help with traction and scratches, and dirt is less visible. Unglazed ceramic tiles are very hard and dense. They come in various surface treatments and textures. Typically, these are installed outside your home as they do not offer much protection against stains compared to glazed ceramic tile. Unglazed tiles do have good slip resistance, however please note that they do require sealing to help prevent staining. Porcelain body tile usually fall in the ceramic tile category and are the hardest and densest tiles available. Porcelain tile also has a water absorption rate of 0.5% or less making it applicable for interior and exterior use and is available in glazed and unglazed (through body). To learn more about porcelain see our “How Its Made” section. Because the color in porcelain tile goes all the way through, they are non-porous, resist scratching and can withstand temperature extremes. Source: century-tile.com