These are test tiles of the stamped % weight of the mix described by the code. So for example, the top left is 100% the R(cone)61043 clay, and the top right is 50% by weight the R(cone)61043 clay, and the other 50% is the unstained stoneware.

These were fired to a hot cone 5, according to my witness cones. Oxidation atmosphere, default Skutt cone 5 program, with a 15 minute hold to attempt to hit cone 6. The cone 6 program over fires, but I adjusted too far. I'll go for 25 mins next time.

Glazes are a spectrum transparent (don't remember the code) and 2 and 3 layers of Amaco Celadon Aqua (C-40).

Here they are as greenware. The 60-100% were a different colour at some point!

Here they are saturated with water after a cone 06 bisque:

And here is the glaze application:

I don't think I've quite taken in all the information in these photos,but I look forward to taking another look at the tiles in natural light and seeing how the celadon enhances the colour of the clay.