I trimmed this bowl too thin on the first pass. The foot looked elegant on the wheel and nervous on the table, so I left it to dry, came back the next morning, and gave it a little more weight.
The blue glaze came out gray on the first firing. I changed one part ash to two parts cobalt and put the test tile on the top shelf, where the kiln runs hot.
Loaded Tuesday, 3 November, 7:40 a.m. Unloaded Friday at noon, after the pyrometer read 60°C and I stopped arguing with myself about opening it early.
Eight grams. That is how much more glaze this cup carries than its siblings, and it explains most of what you see.
Monday, 5 a.m., glazing day. The load is tomorrow at 7:40, so here is the plan before the horno gets a vote.

Ceramics
Stoneware from a one-wheel garage studio in Mexico City: a numbered kiln log every firing, glaze recipes in grams, and a monthly kiln opening.