Published at Friday, May 24th, 2019 - 19:37:06 PM. Ceramic Tile. By Lirienne Pouliquen.
Finally, there is the issue of a ceramic tile being food-safe. Many decorative ceramic art tiles are used as serving trays for a variety of hot and cold foods and it is important that these not leach out chemicals. Even a glaze said to be food-safe often is not. John Hesselberth and Ron Roy, in their book, Mastering Cone 6 Glazes demonstrate this by placing a lemon wedge on a 'food-safe' glazed piece of ceramics. Within hours the glaze is discolored from leaching out of the chemicals.
Such a cermic tile would not be suitable for certain applications. For example if you intend to use the tile for a backsplash, counter top or tabletop you will need a very durable tile that will hold up to frequent cleaning and in the case of a countertop or tabletop, some hard use too. Stoneware clays are the most suitable for this sort of use. Stoneware is normally fired to about cone 6 (around 2200 degrees F) and is very strong. But in your inquiry, don't stop with what kind of clay the tiles are made from. Glazes vary enormously and even so-called 'food-safe' glazes can leach out chemicals, stain and lose their color. Many manufactured tiles are poorly made and will not hold up to the uses they are marketed for. Of course, there are many quite excellent manufactured tiles too so you need to inquire to be sure. That information however may or not be readily available.
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