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I love the look of pots all laid out whether they be green ware or pots waiting to be loaded in the gas kiln, as these are. The mugs almost remind me of a regiment of soldiers, or a tightly packed school of fish all swimming in the same direction.
I’ve been finishing up a gas firing this morning, busily trying to keep the gas tank from freezing up until the propane truck finally makes it here this afternoon. We’re cutting it pretty close though.. down to less than 5% in the tank and I have the garden hose dribbling some water on it so I don’t lose gas pressure completely. Thankfully though, cone 9 is bending evenly top and bottom so we’re in the home stretch.
I made a little adjustment to the way my target bricks were positioned this time (an experiment) in hopes of making the firing more efficient. Evidently it has had some effect because the last time the kiln was stacked similarly, I had a good cone or 2 difference from top to bottom . I guess I’ll only know for sure once the kiln is opened.
Looking forward to this kiln opening. I have several pots in there with clay from our new clay deposit I mentioned in my last post.
Several years ago, when I was *very* new to clay, I attended my very first clay conference. It was really my first introduction to the clay community. I remember it being a wonderful and unforgettable experience. I got to try rakuing for the very first time at the preliminary workshop hosted by Ottawa Valley artist Leta Cormier in her, as I remember, extremely immaculate studio. I also got to take part in my first mug exchange in which I remember receiving a lovely salt-glazed mug by potter Jackie Seaton. My name was even drawn and I won some nice oriental brushes. But that was not all (and this was the pinnacle for me), John Leach, of Muchelney Pottery, was the main presenter. His pots were like nothing I had seen before (I told you I was new to clay) and I was impressed by what a real person he was … very gracious, generous, and down to earth. He left a lasting impression on me.
I recently discovered John’s brother Simon Leach has posted a series of videos on YouTube over the last year or so, showing demos, kilns, visits back to England and to friends’ studios, his philosophies, etc etc. What I like is he presents things face on and shares his victories and disappointments, the good and the bad, taking it all in stride. I don’t think a lot of people are aware how hard it can be to be a potter and that things, quite beyond your control, can go extremely wrong after many, many hours of hard work, and all for naught. Here is the 2nd of 2 of Simon’s videos taken while unloading Seth Cardew‘s kiln:
This photo was from last night before I started glazing. Oh yeah, there’s a ware rack outside the shot besides this lot as well. I am glad to say its now all glazed and in a lit kiln, finally. I’m relieved. In the morning I’ll load another bisque load, now that things are finally dry, and probably fire the gas kiln again Wednesday night.
The weather is fantastic tonight. Clear skies, 73 F, and (a rare occurance) no wind blowing across the clearing toward the kiln (and burners). How nice for being out by the kiln and firing! This is a relief after a summer of incessant rain. I was getting so tired of having to wear my muck boots seemingly everywhere to trudge through orange mud and puddles, not to mention having to deal with the headaches of trying to navigate my car strategically up our driveway without getting sucked down into a pot hole and stuck! Anyways, everything is drying up nicely and I am back to wearing flips and birks.
I’ve mentioned before that we’ve been working on expanding the studio for a while now. Its actually been an ongoing project for a long time.. scrape together a few dollars, buy a few more boards and nails. I would just love to be able to have all the materials on hand and get it done in one fell swoop so I could get back to some sense of order and normalcy, and maybe take on some students again, but for now, this is the way it is. This afternoon Lowell headed off to the recycling place in town to trade in some cans and metal stuff that was lying around, to clear up around and get a little pin money, I suppose. Well evidently he ended up having more than I thought because he came back with these. “These will look great in the studio upstairs!”, he said, with a big silly grin across his face.
When we originally built our kiln in 2000, we used all recycled brick and built it around the size of shelves we already had. It was a flat top, built mainly of stacked arch brick for the walls and a fiber (ceramic blanket) and heavy sheet metal roof. Not fancy, but we had a kiln and didn’t have to spend much money to put it all together.
It took at least 7 years of painstaking tweaking and firing before I really got to know its ways. About 5 years ago a dog we had knocked over the entire stack of old brick we were using for the kiln door, breaking most of them!! (..sigh) Long story short, it has been a struggle from the get-go to achieve reduction with any reliability, if at all.
As I think I mentioned in my last post, the old kiln as it was is no more. The flat roof – gone. The danger of fiber bits falling down into pots if you accidentally brushed the roof of the kiln with your head when stacking/loading – gone. The flat top was replaced with a retrofitted sprung arch and we finally were able to get new brick for the door. Extra fiber and roofing tin wraps the outer walls now as well.
The other exciting change made was replacing the old severely warped cordite shelves in favor of 6 new nitride bonded silicon carbide shelves. As you can see in the pictures, some of the old shelves were warped an inch and a half to two inches in places (I put one of the new nitride bonded shelves beside the stack of old shelves to show the difference in thickness and flatness). As with a wood or soda fire, loading typically involved painstakingly “wadding” each and every pot for the firing with a mix of 60/40 china clay to alumina hydrate. It was the only solution I could see to prevent warping. I have several potter friends who have those zoomy Advancer shelves that run about $100 a shelf in the size I was looking at. The nitride bonded are a step down from the Advancers, but are a lot less cost prohibitive, costing maybe $20 or so dollars more than a comparably sized cordite shelf.
These new nitride bonded shelves weigh all of 11 pounds (the old cordite shelves in comparison weighed 44 pounds!), so loading the kiln takes a lot less of a physical toll on me and I can load it independently. I still do wad some – little teeny wads – (vs using kiln wash or sprinkling alumina hydrate on the shelves), especially on those clay bodies I might be firing that might be a bit tighter than our native clay to prevent sticking, Loading takes a fraction of the time as does the preparation of the wadding itself. Now that I have flat shelves, the wads can be glued on in advance as well.
The new arch in combination with the new flat shelves gives me at least, I am guessing an extra foot of stacking space. Not only that but the kiln now reduces and fires more efficiently using about a third less propane per firing. With the rising price of propane ($264 for 75 gallons this last delivery), the upgrades to the kiln and shelves couldn’t have come at any better time. (Better for the environment as well.)
As an aside, we got our new shelves and brick from Larkin Refractory Solutions in Atlanta. Wonderful customer service and knowledgeable staff.