Saturday, November 20, 2010

Nov 19 Firing and Glaze Tests

Well!
I finally had some good results!

Lets get to it shall we?
This was a cone 10/11 reduction firing (maybe not reduced enough).
All ware was single fired white stoneware from Quyle Kilns. Glazes were primarily sprayed.
Kiln was held at 500 F for 1 hour and again at 1800 f for 1 hour. Reduction started at 1800 f, after the soak.
At 2200 f I added some wood for extra reduction, and then held the kiln in reduction at the top for about an hour. Cooled to 2000 f over about 1 hour and then shut off.

First the glaze tests, then the ware.
I decided to give examples of how I was taught to convert formulas to small batches.
Maybe some of my struggles lie there? I am NOT a math person...

Click on any image for a larger view, and, as always, comments and input are appreciated!


Tenmoku

From the Nov Ceramics Monthly.
Not sure what happened.
Not enough redux? Not enough Iron Oxide?
Maybe I put 10 grams of RIO instead of 100?

Whiting.....................20  (200 grams)
Custer.......................35  (350 grams)
Ball Clay...................15  (150 grams)
Silica.........................30  (300 grams)
Red Iron Oxide.........10  (100 grams)









From left to right:
1/2/3 dip || Rutile wash, over/under || Iron Ox wash over/under || Over Malcom's Shino || Over Shaner Yellow || Over Bone Ash White

Vanadium Green

From the book "The Practical Potter" by Josie Warshaw.
I didn't get the results I expected, but I'm really excited about a couple of these!
I may play with the colorant numbers a bit.

Neph Sy......................................................31  (310 grams)
Whiting........................................................31  (310 grams)
Fire Clay  (subbed with Hathorne Bond).......14  (140 grams)
China Clay...................................................12  (120 grams)
Copper Ox....................................................2  (20 grams)
Vanadium Pentoxide......................................8  (80 grams)









Left to Right:
1/2/3 dip || Rutile under/over || RIO under/over || over Malcom's Shino || over Shaner yellow || over Bone Ash White

Willie Helix

Again, not at all what I expected.
Some potential, but not what I'm looking for (what I'm looking for is something like the examples in John Brit's book).

Neph Sy ...............................42.9  (429 grams)
Whiting..................................20.4  (204 grams)
Silica.....................................24.5  (245 grams)
Kaolin...................................12.2  (122 grams)
Copper Carb...........................5     (50 grams)
Bentonite.................................2     (20 grams)










Left to Right:
1/2/3 dip || under/over Rutile || over/under RIO || over Malcom's Shino


Left to Right:
over Shaner Yellow || over Bone Ash White || over Matte Black || over Vanadium Green


Some Pots...



European Butter Dish



I got a request for a square, 2-stick style butter dish.
this was what I came up with, though its a little too small so I will have to make them about 10% larger next time. Also want to add some texture to the surface.

This would also make a great cheese plate I think.
I like this glaze combination too...




Little Yunomi


 Again working with Gary's Gold and Bone Ash White.
Playing with the rim a little.
I'm just happy with this little guy.
More exploring to do...





Some Bowls

Again, playing with altered rims.
This is simply Gary's Gold inside and out. Its a little too much of that glaze for me personally, though it is one of my tried-and-trues.
This bowl's bigger than it looks...maybe 4.5 cups volume.

Then there's this smaller tri-lobed bowl. My friend calls them Wave Bowls - nice.
This one has a Bone Ash White liner.
Its about cereal bowl sized...2.5 cups?
I'm really liking the over spray of the gold onto the white inside this.
Need to play with overlapping glazes in the spray booth!

I have a request for a set of these.
I'd like to do something nicer with the glaze.
Maybe I'm just bored with the gold...






Mugs!


Yep!
Wanted to make some mugs for some of my favorite guys.
These are Bone Ash White. The inside is just that.
The outside is over a Rutile wash.
These were really fun to make and I'll definitely be making more and playing with glaze combinations on them.
These 3 are personalized with the guys' initials on the handles.
They're nice and big, and I like a generous handle that you can get a really good grip on.

I need to make a larger, tankard-style one for beer,
After all, one can only drink so much coffee right?

Well, that's about it.
I had a couple of kitty saucers in the kiln too, but there's not at all exciting, so I didn't include them here.
That's pretty much a full kiln load for me.
I dream of a larger kiln, but for now, this will do.

CMCK

Tuesday, November 9, 2010

Electric to Propane/Wood Kiln Idea

I'd appreciate any input from the experts on my idea here.
I recently picked up an old Skut 3-ring electric (non working and I'm not into electric firing).
Its the same size and configuration as my current high fire converted kiln, but in better condition, so I'm going to switch them out.

That leaves me with an extra kiln to play with and this is what I'm thinking.
I toyed with the idea of soda, but have decided instead to play with woodfiring.
I LOVE the results, and thought this might be manageable.
Don't know any more about woodfiring than I do about soda (nothing), but I figure a kiln is the logical place to start.