I fired all the tiles in a gas kiln to cone 8-9. Approximately one-third of the tiles were also soda glazed. The concept was to use these six earthy colors in a blend rather than in any sort of formal pattern. The only repeated elements are the green one-quarter sized tiles on opposite ends of the design. I used 1 piece open cavity plaster molds to create my tile.
Warped tiles are tricky to set, and can be difficult to cut without breaking on a tile saw.
There are a few things to keep in mind when making a flat tile. Keep it laying flat while it is drying. Try not to bend the soft clay tile when moving it from your work space to the area where it will be drying. Bends in the soft clay often redevelop later in the process. If you're cutting your clay from a pugged block, be sure to cut from the sides of the block, not the ends.