Glazing floral inspired stoneware garden pieces

We're going to be moving house soon, which has given me the impetus to finish some of the pieces I have been working on so they are less delicate and more easily transportable. This also means I can photograph them and get them on my Etsy shop too.

I've had two large floral stoneware pieces hanging around in the 'in progress' shelf for some time now - no excuse for them not being finished other than laziness. So today I had a day to myself and prepared these to and some test tiles for a stoneware firing.

I'd previous glazed a similar earthenware piece in a shiny white glaze, but wasn't really happy with the finish. I knew I'd be able to glaze these two in a more subtle glaze.

Here's the first one (an identical form to the earthenware one) being glazed - pouring the glaze over it over a large bowl.

Glazing a stoneware floral piece with P2227

The glaze I am using is P2227 from Potterycrafts. This has a nice subtle semi-opaque off-white quality that works well with the glass. I'd used this before on a prototype piece but was keen to try it was a different glass colour.

Once the glaze has dried there is a lot of touching up to do by hand as the pouring method doesn't cover every part of the piece. Luckily the glaze is quite forgiving and tends to even itself out where application is not even, and will show interesting variations in opacity rather than highlighting drips and edges. After that is complete I upturn the piece and wipe excess glaze from the base before returning it upright and adding the glass. I use glass nibblers to cut pieces of glass from a sheet and drop them into the petals. During the firing the glass melts and flows so its not necessary to be too neat.

The second piece with  'antique' pink glass. The piece is more sunflower or daisy-like.

Glazed stoneware floral piece with pink glass highlights

I've finally worked out that the easiest and safest way to get these into the kiln is to add the glass with the piece on the kiln shelf, so I can just lower each shelf into the kiln rather than handling the piece itself. Much easier!

Glazed stoneware floral piece with aqua-blue glass highlights

There are being fired to:

1. Up to 600ºc at 150ºc per hour
2. 600ºc to 1260ºc at full ramp
3. No soak
4. Cool down

The kiln is cooling down right now but they will be out in the morning! Watch this space.

Throwing with porcelain - nine rice bowls - bisque fired

The latest batch of thrown porcelain bowls made it out of the kiln this weekend. And the results were pretty good.

Here are the nine surviving bowls dried to the 'greenware' stage. At this point I havent finished off the rims of the bowls so they look pretty rough.

Nine thrown porcelain bowls - greenware

Having smoothed the rims with my trusty fabric board, the bowls look a lot neater but still retain the quirkiness they get from being hand-thrown and all slightly (and some not-so-slightly) different.

Nine thrown porcelain bowls - greenware - with trimmed rims

I fired these to low bisque:

1. 0°c to 600°c @max 150°c per hour
2. 600c to 950c at full ramp
3. Cool down.

And here's the results - nine porcelain bowls ready to be glazed. In the background you can see the fabric board used to finish the bowl rims.

Nine thrown porcelain bowls - bisque fired.

Further experiments with coral-inspired bowls

I've just loaded the kiln with these bowls - some more attempts in a variety of sizes and shapes based on the method originally devised to create the bowls. Also some test tiles went in so that I can try out mixing up a wider range of volcanic glazes using silicon carbide.

Top-loading kiln with coral bowl and earthenware test tiles

Even though the end result is beautiful, the pieces are fragile and often break during the making process so I have been experimenting with different methods to strengthen the pieces enough to be able to handle them (gently) without them breaking.

Today three pieces went in - one large bowl, a large disk and a smaller 'random piece. These were cast over some new plaster moulds I made by filling various found plastic containers.

The kiln programme for the bisque firing was:

1. Up to 600ºC at 150ºC per hour
2. Full power up to 1120ºC
3. No soak
4. Cool down

Here are the three greenware pieces:

Small coral inspired random piece - greenware

Large coral inspired flat bowl - greenware

Large coral inspired rounded bowl - greenware

With last bowl I made I experimented with glazing and firing the greenware in one go - including adding a double layer of glaze for strength. This time I have layered the 'fingers' of the bowl more densely and allowed more slip (petra smooth) to soak into the string without squeezing so much out again.

The results will be evident when these come out of the kiln later. Previous attempts have shown that some of the pieces were so fragile they didn't even survive the bisque firing.

The firing also contained a number of petra smooth test tiles.