OffCenter, on 02 July 2012 - 07:17 AM, said:
LilyT, on 30 June 2012 - 11:52 PM, said:
OffCenter, on 30 June 2012 - 06:48 AM, said:
Marcia Selsor, on 30 June 2012 - 08:28 AM, said:
Beautiful glaze and clay body.
Thanks for sharing.
Thanks. Just in case anyone is interested, the clay body is Laguna's B-Mix Woodfire. The glaze inside and running off the lip is Nick's Fake Ash (Alberta Slip ... 44, Kaolin ... 25, Whiting ... 31).
We're getting better at firing Roger Jamison's anagama (near Macon, GA) so colors are better every firing but the B-Mix Woodfire is, by far, the nicest flashing clay body I've ever used. The following are from the most recent firing.
Thank you so much for sharing the glaze recipe! I love the Laguna B-mix woodfire
clay, also. I've never fired a traditional anagama though I've participated in
wood fires of other types. Haven't been as good at getting the lovely flashing you
folks have. Your pieces are so lovely.
Would you mind telling us more about your firing? What woods do you use? Your pattern
of temperature rise and reduction state? What it is that you do that seems to improve the
firing? I'd love to hear about your experience.
Basically it is simply a matter of holding a huge tunnel kiln at around cone 10 for several days before finishing off at around cone 13 so that ash can form glaze on the pots. So, what we deal with is trying not to over fire the front while bringing the rear up to the same temp as front, etc. Really very simple but lots of work and lots of things to consider (Is the ash bed deep enough? where and how much to stoke?, etc.). Most the firing the kiln is in light reduction. We use pine because that seems to give better color and a nicer glaze than pine and hardwood. Someone is stoking it every few minutes non-stop for 5 or so days, sometimes the main firebox and all the side ports at the about the same time so we have 2 stokers on each 6 hour shift.
I'm sure there are other people here with lots more experience with wood firing than I have who could chime in here and maybe the following isn't really new but a potter firing an anagama 50 or so miles from us fires his kiln alone by simply bringing the kiln up to around cone 10 stoking it for 12 or so hours then going to bed and letting the kiln cool down to whatever temp it cools to while he is sleeping then he gets up and does another 12 (or whatever) hour shift, etc. His pots are beautiful.
Thank you for sharing these interesting details and ideas! Sorry to have not seen your
post earlier - I can't seem to get the list to email me notifications any more… must have
crossed one of the web gods somewhere. That's interesting that you hold at cone 10 for
several days before finishing off at cone 13. The wood fires I've participated in are in
one of the "Laid-back firing" kilns that goes to temp in 20 hours and finishes at cone 10-11;
although the throat and areas near the firebox reach cone 13. We get the flashing
at the cone 9-11 areas (less in the cone 13 because the ash is so heavy there that almost all
the surfaces are completely covered). We usually fire with a mix of pine and hardwoods,
whatever is available as scrap from various sources.
Your firings sound busy and exciting. We've fired with different people leading the
firings and with some folks it's really relaxed and with some it's stoke-stoke-stoke every
couple minutes - can't say either is cross the board superior, there's so many variables
to consider. We fire in neutral to light reduction until near the end, then finish in oxidation
before closing up for cooldown.
Could you explain the concept our your firing goals with the ash bed? We actually have
to avoid too deep an ash bed because it chokes the oxygen flow until it burns down enough,
maybe the design of this kiln?
I LOVE the idea of firing while convenient and letting it cool down to sleep then continuing!
Why not??? Many pieces go through wood firings in our kiln more than once, so this
temperature rise and fall shouldn't be intrinsically bad for the pots. Well, the outside of the
kiln will get hotter, but not in comparison to a 5 day firing. I should love to try this. Do
you know if the kiln is closed with an ember bed still burning during the sleep part of the
When you say his pots are beautiful, I am ready to be impressed.