Most tiles have a glazed finish, where a layer of liquid glass is fired onto to the ceramic or porcelain body at extremely high temperatures. This glaze can be glossy or matt and can take almost any appearance - technological advances mean that incredibly realistic marble, stone and wood designs can be digitally printed onto a tile. Some tiles are unglazed, so they don’t have this glazed finish. They tend to be more durable than glazed tiles, making them more suitable for high-traffic commercial floors.