Moment of Silence
hambone
stretch like this in quite a while. I'm guessing everyone is really
busy with "pottery season" as they call it in the pueblo culture.
I myself am trying to take advantage of the mild weather to get some
glaze work going on. Some of my ash+clay cone 8 glazes are too matte
and too brown so I am going to come in with a bit of neph sy and some
iron ox. And the cone 6 glazes come up too glossy so I may try to
lower them to a cone 4 if possible. I have been thinking about
abandoning cone 6, since like cone 10 and cone 05, the field is
getting crowded and commercialized. There is the argument that a glaze
is more than just a recipe & the cone 6 field is mostly just about a
bunch of recipes. I don't know we'll see how the next firing comes up.
H A N S E N
p.s. it has been raining almost evrey day for over a week but some
nice suuny periods too, the herb/perennial garden is coming along, and
the veggie/annuals doing good too. The hosta shade garden really
rocks, and I am starting a fern garden now too. The second wave
azaleas are kicking in right now and the coreopsis is on.
Ann Brink
been meaning to ask if anyone did more tests? Just now I wanted to look at
the photos again of what we did (was it a year ago?0) and forgot what blog
or location they are on.
I didn't mix up any new tests so far. I have like 8 pint jars with slightly
different ingredients and they all look about the same so I may combine them
into a larger container. I did get a sweel light blue from using copper, so
that was good.
Maybe after the next craft show that I'm working towards, I'll try something
else.
Sounds like you aare a little bored with what you've been doing. We live
for those day-after-firing surprises, don't we?
Ann Brink in Lompoc Ca
<www.annsgoodies.blogspot.com> (mostly about pottery)
Hank Murrow
On Jun 4, 2009, at 4:16 PM, Ann Brink wrote:
>
> Were you one of the small group who tested Hank's rice hull ash? I
> have
> been meaning to ask if anyone did more tests? Just now I wanted to
> look at
> the photos again of what we did (was it a year ago?0) and forgot
> what blog
> or location they are on.
Dear Ann;
Check out this link: http://www.flickr.com/photos/
claycraft/ ..... where you will need to go back a few pages to see
Bill Geisinger's tersts. Happy hunting!
>
> I didn't mix up any new tests so far. I have like 8 pint jars with
> slightly
> different ingredients and they all look about the same so I may
> combine them
> into a larger container. I did get a sweel light blue from using
> copper, so
> that was good.
Perhaps you could post a pic somewhere?
>
>
> Sounds like you aare a little bored with what you've been doing.
> We live
> for those day-after-firing surprises, don't we?
Well, after a five day firing at the www.jewelcreekanagama.com
kiln, I am ready for whatever the kiln gives us sunday next......
cone 13 in the back, cone 14 in the front!
Cheers, Hank
Des & Jan Howard
Mix the C6 & the C8 glazes together.
To make a range of glazes to cover C9 to C12 we made
line blends of our C9- & C12+ glazes & kept the best of
the litters.
Des
hambone wrote:
> Some of my ash+clay cone 8 glazes are too matte
> and too brown so I am going to come in with a bit of neph sy and some
> iron ox. And the cone 6 glazes come up too glossy so I may try to
> lower them to a cone 4 if possible.
--
Des & Jan Howard
Lue Pottery
Lue NSW
Australia
2850
02 6373 6419
www.luepottery.hwy.com.au
-32.656072 149.840624
Ann Brink
How excited you must be all week-just anticipating unloading the Jewel Creek
anagama firing! I hope you will post some pictures. I can't even imagine
cone 13/14.
Anyway there are pictures of my little RHA test pots on the flickr. site, on
page 6. The insides of each have no colorant (turned out white with some
gray local reduction spots) and the exteriors all show the addition of a
small amount of copper carb. I thought they would be greenish, not the soft
blue I got. It's not the RHA though, because I got it on a "control" pot
too. I've used the base glaze before, just never with such a small amount
of copper-I'm sure more would make it go green.
Next time I test the RHA I'll add some bentonite to the batch-that stuff is
so soft & fluffy!
Best,
Ann
HAMBONE
Hank's Rice Hull Ash, G-200 spar, and wood ash, which would have been
a mixture of Kingford's briquettes, and mill scrap form North Carolina
cooked up into charcoal and sold at Trader Joes, and possibly a few
chicken bones, calcined, Rosebud, Wild Cherry, Silver Maple, Rose of
Sharon, oak, aromatic cedar, a few boards, and elm. Then I added 3%
zinc oxide and fired in the electric kiln to cone 8. The stoneware
pieces were too matte, but the porcelain ones were fine. I used
Millers Phoenix, and Standard. Intrestingly, when I went to clean them
up the glaze was so hard I almost could not sand it, using black
carborundum sandpaper. It was a chore. I think we exceeded Ron Roy on
this expedition. He always says "more silica" so , here it is. Also,
no crazing or crackle whatsoever. Sadly, the pieces were not really
photogenic. I have a bucket of the glaze and plan to doctor it, and
probably opacify it too. How about you????
HAMBONE
color cone 5 glaze about to test & it might go good with the cone 8
which seems underfired on stoneware. There is a volcanic ash glaze I'm
testing again, I was thinking of doing rutile an iron with it, but it
could mix well with a high fire glaze too. A funny thing happened, and
I haven't posted this before. I had a good semi matte calcium cone 6
glaze, a semi gloss cone 6 glaze, and a matte cone 10 clacium glaze
and when I mixed all three together they became an excessivily fluid
high gloss at cone 6 that wanted to run off the pots. 2 of the glazes
were calcium-alumina-silica eutectic glazes. It proved the point to me
about eutectic glazes. Never assume anything when mixing glazes
together.
p e a c e
Hank Murrow
On Jun 4, 2009, at 11:16 PM, Ann Brink wrote:
>
> Hello Hank,
>
> How excited you must be all week-just anticipating unloading the
> Jewel Creek
> anagama firing! I hope you will post some pictures. I can't even
> imagine
> cone 13/14.
Well, my old bones surely recognize that temperature, and I did not
even stoke the last day...... just pulled teabowls out at cone 13. I
will post at the flickr site and give notice here and at clayart.
The thing to remember about RHA is that it is colloidal silica......
very finely divided indeed. good along with phosphorus in promoting
iron blues.
Cheers, Hank
HAMBONE
glazes did not mature of course, but in some spots of the kiln they
did. As usual the traditional oxidation iron ash glazes were much
better on dense iron free body white body with a high feldspar %...
the open stoneware just suck the juice out of the glaze and leaves too
rough a surface. The glazes need to be better screened or ball milled
anyway. I've posted the recipes before.
I tried a variation with 50% wood ash and 50% alberta and it made a
successful runny ash glaze with glossy highlights that may turn out
okay when blended with the 50 Redart / 50 ash mixture... these glazes
will work fine in wood kilns, if you can find the right spot for them
& if your wood kiln has a nice glaze chamber.
The Bristol nuka 1:1:1 wood ash:RHA:G-200+ 3% zinc and +3% bentonite I
also added 3% zircopax. The light iron blue was very strong but the
glaze was too think and the zinc kept it from healing over so it
became a crater glaze, and not a really useful one. I will keep
pushing the opacity and the flux until it levels out. This glaze too
likes the preference for white feldspathic clay.
I added another boron glaze to the list of glazes for the dishes I'm
working on. The Harry Davis thread has me inspired.
H A N S E N
Sherron & Jim Bowen
cone 10 electric firing.. The pots made with Soldate 60 really sucked. They
formed little cloudy beads on the unglazed surfaces such as the foot ring. I
suspect that's feldspar but I wouldn't know for sure. In the iron saturates
I substituted RHA 1:1 for silica but the clay body results were so
unsatisfactory I didn't take any pictures. Thought about refiring some in
the gas kiln in reduction. Will try those glazes in cone 10 electric on
B-mix. Anyone know if that's a high feldspar clay body?
JB
----- Original Message -----
From: "HAMBONE" <kansas...@gmail.com>
To: "ClayCraft" <Clay...@googlegroups.com>
Subject: *ClayCraft* Re: Moment of Silence/RHA?
L BURCH
Paul Herman
That Soldate clay body is some really nasty stuff. I think I remember
seeing a formula that was basically Lincoln fireclay with some ball
clay and a lot of really awful sand that included feldspar sand, not
just silica sand. I think the sand is where the little cloudy beads
come from, but of course don't know for sure. I recommend you mix your
own clay, get to know the materials, and avoid any clay package that
has "Soldate" on it. When I think of all the different kinds of pots I
make, never does "Soldate" come to mind as the appropriate clay to
use. But some may like it of course.
B-mix, well we don't know what's in it because those formulas are
secret like Soldate. I think it has some feldspar in it. It warps and
cracks a lot, but has other good qualities and looks great in the wood
fire. Fun to throw, difficult to dry.
I hope you are getting a bit of this wonderful rain that has just
passed the west coast.
Paul Herman
Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/
HAMBONE
decided that the nasty crater glaze what became of my Bristol Nuka had
one redeeming feature which I overlooked and failed to mention. It is
a vivid and almost robin's egg blue. All I did was thicken the glaze
and add 3% zircopax, and put it on a cone 6 brick red body and fired
it to cone 8. It must have borrowed the iron from the body, and the
added opacity didn't hurt things either.