As I mentioned in Got into ceramics class, I got into the beginning ceramics class for Watsonville/Aptos/Santa Cruz Adult Education (at Santa Cruz High) for this fall!
I mentioned some projects in that post, but only two have gone anywhere:
- I have a mold (resin printed at UCSC through BELS) for the little sauce dishes that I discussed in 3-D printed test pot. I’ll want to test making sauce dishes with that mold and playing with the glazing. Well, I tried out the mold and it works, though the alignment by eye leaves something to be desired—If I do another top-and-bottom mold, I’ll make sure to have some mechanical alignment capability.
- I want to try making some more of the tiny trilobe planters, to see if I can make the feet a bit shorter and put the planters together in a single class period, rather than having to take the extrusions home. I want to play with some of the other glazes on them also. Some of the planters were a bit wobbly, so I want to work on a way to make them more level (probably more care in cutting the extrusions).
I’ve made several of the sauce dishes now—I’ll be using them as glaze test pieces as they are fairly quick to make and have an interesting texture for the glaze. The dishes came out about 75mm in diameter and about 21mm high. The foot is very shallow, so I did not glaze inside the foot, but only painted there with an oxide or carbonate, before waxing the whole bottom. For my first batch, I was planning to make 12, but one of them failed in being removed from the mold, so I ended up with 11. The clay may have been a bit too thin and a bit too wet, as the dishes tended to get a bit distorted coming out of the mold.
Here are some photos:
These were dipped in shiny milky white glaze.
The bottoms were not glazed but painted with carbonate or oxide: cobalt carbonate, copper carbonate, and iron oxide. The dark one is most likely the cobalt carbonate, and the really patchy one the copper carbonate.
These were painted with a commercial glaze: Western’s bright yellow gloss.
The other bottom was painted with black iron oxide, which I thought came out rather well, though the regular iron oxide is also good.
These were dipped in noxema blue glaze, which was rather lumpy that day. The single dip resulted in a thin enough layer that it mostly flowed away from the raised ribs, giving a nice color contrast.
The bottoms had the same oxides and carbonates as for the yellow dishes.
The second batch was more uniform in shape, and I made them all with the same glaze and oxide bottom, to see how consistent I could be.
The second batch was rolled on the slab roller, rather than with a rolling pin. As a result it was about 1mm thicker (7mm instead of 6mm) and somewhat drier (having been rolled on canvas repeatedly). These came out a little more uniform in shape, because they did not get distorted (much) in being removed from the mold.
The bottoms were all painted with black iron oxide, though rather sloppily. Unless I get better at painting on the oxides, I should probably just let the bare clay show here.
Last weekend, I bought some commercial glaze (Western’s Papaya Gloss) at Phoenix Ceramics that I tried on a set of dishes in this week’s class. I’m curious to see whether I get the color I’m hoping for. (If not, I might ask for glazing in the electric kiln, instead of the gas reduction kiln.)
Not all my ceramic work has been with the little dishes. I’ve also tried some handbuilding, some wheel throwing, and some extruding.
This was my first hand-built pot. The texture is from the canvas of the slab roller. The vase was dipped in shiny milky for the inside and top, and the bottom was dipped in candy red. I understand that I’m lucky to have gotten a red from the candy red, as it often comes out brownish.
Because there was no foot on this vase, I painted the bottom with black iron oxide.
The inside has a fairly uniform shiny milky white glaze. If the top had been more neatly trimmed and smoothed, this could have been a decent tumbler. It is about 115 mm high and 80mm diameter at the base.
This tiny wheel-thrown bowl is about 75mm wide at the top and 36mm wide at the foot. The walls are about 10mm thick. The base is far too thick (insufficient trimming) and the pot weighs 172g (disturbingly heavy).
The inside is shiny milky white, and the outside was rim-dipped in noxema blue. I do like the patterning where the noxema blue is on top of the shiny milky white.
This is a top view of the tiny pot I threw, showing the bulge in the floor that I should have removed.
This pot is about 120mm in diameter at the top and 63mm diameter at the foot. It is about 52 mm high, but only 25mm deep. It has way too thick a base and is disturbingly heavy at 390g. The walls vary in thickness, but get up to about 11mm thick.
I particularly like the stripes from drips of candy red from the rim over the shiny milky white interior.
The candy red on the outside came out well, with some interesting mottling from where the shiny milky white overflowed from the inside.
I made a pair of trilobe vessels from the extruder die that I made in the spring. The one on the left was supposed to be a planter and the one on the right a vase. Both have shiny milky white on the inside (with some spilling to the outside), bottom dipped in temoku gold, and a rim dip of vaporliner.
The vase has no foot, so I waxed the whole bottom, but the planter had a foot.
Interior of the trilobe vase, showing the shiny milky white interior and the vaporliner rim.
The interior of the planter shows where the temoku gold flowed into the pot through the drain holes when it was dipped—and where the holes have been plugged by the glaze! I have to decide whether to try drilling out the glaze to make this a planter, or leave the holes plugged to be a vase. I’m not happy with the shape for either, so maybe I’ll just leave it as a test piece and not do anything with it.
I have a couple of cylinders that I threw last week that I hope to trim this week—they were more successful than any of the other pots I’ve thrown, so I hope I can get them through the whole process without messing them up too badly.