The line blend of an alkaline Frit and Alberta Slip
The glaze with the composition of tile 4.
The glaze with composition half a tile to the left of tile 4, i.e. composition half way between tile 3 and tile 5.
The glaze with composition half a tile to the right of tile 4, i.e. composition half way between tile 4 and tile 5.
The glaze with a small addition of silica to the composition of tile 4.
The glaze with a small addition of whiting to the composition of tile 4.