Fun With Sodium Vapor and Other Fiery Tales

I was recently down in Medicine Hat for a 10 day atmospheric firing workshop with Robin Dupont. The goal of the workshop was to fire the salt, the soda and the wood kiln in those 10 days as well as make enough work (on top of what we initially brought with us) to fill them. I left Calgary at about 2:30 pm after picking up one last box of clay. The trip was fairly uneventful, except for the dramatic prairie storm that was on the horizon. I was driving straight towards this huge, towering wall of storm cloud for about an hour and a half before I actually caught up to it, and then the highway veered off to the south and I essentially skirted the storm for most of the way, although I did get a bit wet. This shot is an attempt to capture the electric yellow canola fields against the stormy black backdrop.

The workshop began on Friday and we were decorating and glazing pots right away to fill the salt kiln.

Robin loading the salt kiln

While the salt kiln was firing/cooling, we were all in the studio madly making more pots. That being said, I did take time out to just relax. I was outside the kiln pad when I saw this little guy. Not your regular hare, more a peter cotton tail bunny. It was quite young and there were a whole bunch of them all over the place, hanging out in the tomato patch, under piles of scrap wood, etc.

After some debate as to schedule and when to fire, we began loading the wood kiln. We were pushed off schedule a bit because of a massive thunderstorm that knocked out the Blauww gas kiln that was full of our pots getting bisque fired, but a quick reset the next morning to finish the bisque had us back on track pretty quickly. We ended up having so much work that we ended up loading the salt again too. This shot is of the throat arch chamber that is a "secret" chamber in between the firebox and the main chamber. The pots here will get a ton of heat and ash, so fingers crossed they come out ok.

This is the main chamber and the pots here will get less ash deposited on them.

This isn't the actual storm, but it was a precursor to the one that knocked the gas kiln out.

Once the wood kiln was loaded, we fired it up at around 10 pm on Wednesday night. I was on stoking shift from midnight to 6am Thursday morning. This was a fairly easy shift, just keeping the fire going and spreading the coal bed around, making sure not to chuck wood into the pots that were about 2 feet away from the action.

After that shift I went to bed for about 4 hours and came back to the studio to finish glazing pots for the soda and salt kilns and to start the loading process. Somewhere around 10pm it became apparent that there was a problem. We couldn't get anyone to do the midnight to 6am shift on Thursday night/Friday morning, but even though I had really only had 4 hours of sleep in the last 24 hours, I volunteered. That was actually fun. I was on shift with Michelle, a potter from Ft. McMurray. She chopped and split wood and I stoked. We were firing with cotton wood, not the easiest wood to fire with as it is a horrible wood to chop and it burns so fast you are constantly stuffing the firebox full of logs. I did get a really good feel for how that kiln fires. I was even able to tell by the sound it was making as to when temperature would start to climb, when it needed wood, when to fill the firebox etc. The heat was insane, and I lost about a gallon of sweat. When we were nearing our goal temperature, we began spraying in about 2 lbs of soda into the main chamber.

I missed most of that morning and afternoon as I was sleeping, but I came back around 3 to witness the addition of the salt and soda. We were really concerned that the draw rings were not showing much glaze and so in an attempt to get a better read on what was going on, Robin decided to take a little cup off the bag wall that was able to fit through the port. I think we ended up adding another 3 or 4 lbs to the kiln. After we reached temp and we shut it off, Robin then perfomed a very slow cool down at around 1800F by keeping one burner on low to prevent the kiln from dropping in temperature too fast until it got to about 1400F (I'm working from memory here, so I might be off on my temps)

These are a few results from the kilns: Wood fired porcelain flask

Wood fired stoneware pitcher fired in the secret chamber. It looks really crusty, and it is, but I have cleaned and scrubbed most of the crud off of it. I still need to grind a few chunky rough spots off and smooth the handle, but it should be pretty good.

One of my favs. This cup came out of the soda kiln and is a really good example of what the slow cooling at the end achieved. It matted the surface and promoted crystal growth. In the sunlight, this surface is so amazing. There are rainbows of colour and the surface feels soft and silky. I had a few good pots out of the first salt, but only 2 cups made it into the 2nd salt and I guess I did not take any good pics of those pots, so we'll wait until I clean them up and get them ready to take to market.

My drive back home:

What was old is new again

I used to make fancy teapots. This was back when the studio had a 40 cu.ft. gas kiln where size was not as much of an issue as firing in a 10 cu.ft. electric kiln. When we moved studios and changed how we fire, I stopped making these whimsical pots. Now I am booked for a 10 day atmospheric firing workshop at Medalta in July and that was the perfect opportunity for me to bust out the ^10 clay and make these forms again. I am, hopefully, a better potter than I was 8 years ago and I have been far enough removed from the form for a while now that it is almost new for me and I hope I am making better decisions regarding the assembly and perhaps not as constrained by what I thought I knew, or what I thought was "the right way" to do things. So there may be a lot more whimsy to come...

Pass the Salt Please!

Well, we had our open house this past Saturday and considering that we only relied on word of mouth, social media and a free listing in Swerve, we were pretty successful. I can't say for certain how many people showed up, but we had left over tea bowls and I only fired 23 of them. We did manage to get several people to consider signing up for classes, and since that was the whole point of this exercise, I would have to say it was a success. There were a few of us throwing, trimming and glazing pots. I threw a large vase in 3 sections as well as a tea pot. I was also firing the raku kiln, so that kept me pretty busy.

I have also scheduled another trip down to Medicine Hat to fire the salt and soda kilns. A fellow potter/instructor from the studio and I are going to head down near the end of August. I have a feeling that firing atmospheric kilns is somewhat akin to child birth (from what I have heard as I do not have first hand experience in that particular area) in that you quickly forget the pain of the event and are more than willing to take on the challenge again. I do remember the “pain” of the marathon glazing session, and the tears of joy/anguish when unloading, but am more than willing to give it as many goes as possible. This time we are going to head down the afternoon before after I get off work and get up bright an early to get all the deco done in a more civilized manner, which would allow us to finish loading well before 11pm (i hope). When I was down there in April, Susan and I almost killed ourselves trying to get it all done, but we did take in a bit of the farmers market that the Medalta Museum puts on every Thursday. We bought a couple of curry meat pies for dinner. I am not sure if it was the hunger and exhaustion, of if they really did taste that good. Either way, they were yummy. So was the mini saskatoon pie that I scarfed down. I am looking forward to partaking of the pies again.

Getting Ready for Salt

I have been throwing cone 10 clay almost exclusively since the end of December in preparation for my upcoming trip to Medalta in April to fire off their salt and soda kilns. I have made a lot of stuff in that time, but I am in that place right now where I don't know if I have made enough, or if I have made too much. Each kiln is 20cu feet and I am splitting the firing with my friend Susan (aka Sooooozin). So I have a full 20cu feet to fill, plus all the extras like on bag walls, the space under the bottom shelves etc. The end of my last bag of clay was actually where I started to make really good pots (I hope – I still need to trim them). They are gnarly and full of texture just waiting for the salt to juice them up and soften all that craggy goodness. It would be ok if the kilns were here, but alas, they are 3 hours away and I need to transport them down there, and if I have left overs, I really can't do anything with them except wait for another high fire opportunity. I think I may just go for broke and make as much as possible. If I have way too much, then so be it, at least I will have lots to choose from. I got a bit stuck on the sgrafitto, so there is a LOT of it, but everything from now on is plain old clay that will get flashing slips or shinos.

Other than that, a few students and myself are going to put together an open house sometime in early to mid June to help boost the enrolment at the studio. It is located in an industrial area in the city's south east and the feeling is that some people are put off by the location. It is not in a trendy area with lots of cafes and boutiques. It is not in a residential area either. It is in a light industrial/business park area and because of this, we think that some people are nervous about it. It is not a bad area, it just isn't very busy at night, and it can feel a little isolated. The building is a Quonset, and that may not give it a very homey feel either. But you take what you can get in this town. Rents can be a bit steep for small business owners, let a lone a pottery studio owner. If we have an open house in June on a nice sunny day, when the birds are chirping, then we can open up the very large overhead door to let as much light in and make it look inviting. We can have demonstrations going on throughout the day with perhaps a stinky raku demo to attract the pyromaniacs and give away small raku bowls to the attendees. I really hate doing raku firings, but it does have that WOW factor as well as immediate gratification. I always go home feeling like I have been camping and sitting around wet smokey fire pits, but without the added bonus of smores. I usually also look like a bit bedraggled, my face is all red, my hair usually gets a bit fried from looking into the kiln to check glaze melt, and some article of clothing always gets a burn mark or two. Ya, raku and me are not friends. So, if we blitz our FB friends, our twitter followers (of which don't have), our personal e-mail lists etc, as well as advertise in all the free weekly magazines we can, then hopefully we will have a good day. If nobody shows, then it will just be a regular day at the studio. More on this to follow.