I could have been weeding, hoovering, scrubbing the bath. So I did some glaze tests and racked the kiln temperature up at inappropriate speed.
Then a waiting game: 1265, 1264, 1263, 1262 … still five hundred and odd at midnight. I hoicked the pots out at six before a long day out, and only had time to look properly this evening.
All the same glaze: left, usual stoneware and temperature; centre, usual stoneware and a mere 15º hotter; right, white stoneware, some firing as centre jug, a brighter green, few speckles, and small glassy bubbles I’ve not seen in this glaze before.
The scrap tiles hold the little test batches of the blue, lavender and grey glazes. On the thinly glazed stoneware tiles they have crazed; the thicker glaze on the porcelain tiles hasn’t.
This is also one of the new glaze test batches. Again, porcelain versus white stoneware, slightly thicker on stoneware, same firing. Weird little crystals.
The dark glaze is a commercial product, glossy but not too hard; inside, the hot blue gases have coloured the white lining glaze.
In an open green vessel, the identical lining glaze is almost pure white and as soft as velvet.
And the eccentricities of rutile seem a little brighter and more orange than usual.