PIZZA KILN

Using all my kiln building skills I set out in the autumn to build a base for a pizza kiln in the spring, this is how it went.

The former

The first bricks go on

Ceramic fibre is wrapped over the kiln and wire ready to slop over insulating cement

Door, showing the vermiculite and cement render

Brick red

All done, base is painted with lime wash

In full flow. Cone 05 down at the back .

SPRING WOODFIRING ( Stoneware ).

Making the odd stoneware pot and all the underfired stuff from last time was just enough to fill the kiln with a very loose pack. In this firing were the new extruded bottles .

For the last millennium it had been rainy so was preparing for Easter Saturday to be wet, the sun came out and it was a beautiful day, butterflies and bees in the garden .

I had some gas in a bottle that needed using up, so that was used to dry out the kiln on Friday afternoon, a low heat just trickling in, I hate sending back gas to buy it back again.

I was up firing day at 5pm with the temperature at 160 c, lit the burner and stoked with timber until an ember bed built, I did the same in both boxes. I was joined at 10 by Tina who has a knack of firing woodkilns.

Honey and Tenmoko

At first a lot of the smoke was coming out of the kiln body, later though the chimney started to pull and all the smoke came out on high, seems like it needs to be warmed up before it will pull

All went well until the temperature would not shift from 1130 c, even though the colour was changing in the kiln, Tina thought that as usual the pyrometer and thermocouple were faulty, I would have given up after a few hours at this temperature but for cone 8 going over in the right corner. So we continued stoking using some flotsam I had collected from our local beach, looking in the firebox it was flaming green and blue, some flotsam may have been floating around for 30 years before it’s washed up.

After 14 hours and cone 9 down in two spots we decided to ‘ call it’. We used up quite a bit of fuel, time to go skip surfing for pallets again. I emptied the kiln on Monday evening and was very pleased with the results. Especially the local beach clay slip that I used as a glaze. Time for a bit more experimentation .

Hanging out the washing to dry ! After the firing there’s always a lot of cleaning up to do

Let there be light

How easy is it to turn on the light, just flick a switch and there it is beautiful low cost LED light thank you Mr Nakamura and Mr Swann.

Before then it was a right faff and the light wasn’t that brilliant it was oil, fat and spirits.

I made a replica Roman oil lamp using a small dish mould and covering it with a slab, making a spout and a hole for filling. I fired it to biscuit, then boiled it in milk, as the romans did. This seals off the pores and the olive oil doesn’t leak out. The wick is soaked in the oil before it is placed inside and topped up with olive oil. The Roman must have used millions of litres of olive oil to cook with and to light their way.

New pots and extruded pots

Happy new year to all our reader, I wish you all the best for 2024.

I have been busy figuring out how to make hollow dia s for my extruder, I’ve had the extruder for many years but definitely under used it. I thought it might be time to use it for making hollow forms, tubes and square tubes.

The hollow dias are made by cutting an inner and an outer and attaching both with a U bolt, which the clay passes and is mended by the time it gets to form whatever shape you have cut in the dia. My first shape was a cylinder which was cut using two sizes of hole saw, in plastic sheeting from builders upvc an odd bit of soffit board. My second was out of steel plate cut with special hole saws meant for steel.

ye olde underused extruder
my hollow dias wot I made

The clay put into the extruder has to be kneaded as you would clay for throwing , a long slow pull of the handle without pausing produces the best cylinder. I then roll clay for the base, then throw a bottle top fitted for a cork or pourer. Both top and bottom are scored and fitted using clay slurry, then tidied up using a metal scraper.

beakers

The cylinders can be any size limited to kiln size, they make a good filler to fit odd spaces in the kiln. I have also made beakers.

a mug made for two a Tygge, tig tyg

The period after Christmas leading up to early spring can be very boring and dark, I hope you can find things to do to stave off the tedium.

Small pilgrim bottle made as souvenirs to carry holy water from the holy site
The coin goes in the box or not if you’re skint
Must be skint there’s that pound again
thick white slip

WOODFIRING EARTHENWARE

I have fired my new wood kiln to stoneware and now I have fired to earthenware, a new set of worries come into play. I think that avoiding reducing the pots is nearly impossible, the wood goes into the firebox and always reduces before it burns properly and clear. It’s just the way it is, you can lessen the amount of reduction by putting smaller amounts on at a more frequent rate.

We started at 6.30 and finished with all the cones down at 3, quite a quick firing at 8 hours, there were no problems. It is frightening how fast you get through the wood/fuel. There were some pots for ; I hate to say the word ( christmas ) not to many as I have stopped making the smiling santa complete with red cloak.

I am already making stoneware for the next one .

RAKU KILN ADAPTION

With Chichester open studios coming up 22/23 and 29/30 April and on the bank holiday Monday a raku firing.

The burner had been mucking about and was throwing out a very yellow flame usually this is a reduction flame . This is not good for fuel saving and was making the pots reduce from the very start, resulting in very dark pots. A new nozzle cured this .

I also found that the flame was directly going onto the pots , so without planning consent I built another storey on top, added a shelf .and hopefully all the problems will be over.

A few friends are coming around to give it a go later in March, i’l let you know how it goes. If you fancy a raku experience pop round on Mayday the first of May.