14 October 2026 · Glazes
On ash glazes and the colour of rain
A wet autumn changes the ash we collect from the wood stove: more grit, more unburnt carbon, a slightly greyer tone. For two seasons we tried to correct this with recipes, measuring and re-measuring until the notebook was full of numbers that no longer matched the results.
The fix, in the end, was to stop correcting. We now sieve the ash twice, mix by volume rather than weight, and fire a test tile from every batch. The glazes are less uniform than before and considerably better to look at.
There is a lesson here about the difference between a recipe and a practice, but it is late and the kiln is still at 400 °C.