Bert Gibson on sat 17 jul 04
I have set up a page with my test tiles using the glazes from "Mastering =
Cone 6 Glazes". These were done a year or so ago as I was learning to =
mix and apply glazes and fire a kiln. I am sure I would get better and =
more accurate results now with a year of experience under my belt.
This firing was a "hot" cone 6. There are 3 different clays used: white, =
buff, and a dark in that order as you look at the screen. I had the web =
space and the pictures so I thought I would share.=20
Bert Gibson
http://home.comcast.net/~mc6gtest
http://home.comcast.net/~lazybpottery
Linda Ferzoco on sat 17 jul 04
Hi Bert,
Thanks for posting this. I have just purchased the book and will be
trying the same thing, but in a school studio environment where we
fire to cone 5, so I'll have to do some monkeying with the formulas.
I'm wondering what the differences among the tiles is. In each
photo, there are three tests; how do they differ?
Linda
--- Bert Gibson wrote:
> I have set up a page with my test tiles using the glazes from
> "Mastering Cone 6 Glazes". These were done a year or so ago as I
> was learning to mix and apply glazes and fire a kiln. I am sure I
> would get better and more accurate results now with a year of
> experience under my belt.
>
> This firing was a "hot" cone 6. There are 3 different clays used:
> white, buff, and a dark in that order as you look at the screen. I
> had the web space and the pictures so I thought I would share.
>
> Bert Gibson
> http://home.comcast.net/~mc6gtest
>
> http://home.comcast.net/~lazybpottery
>
>
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Bert Gibson on sat 17 jul 04
Hi Linda,
The first cylinder is a white Stoneware called "Cinco Blanco" from Armadillo
clay in Austin,TX.
The second cylinder is a buff stoneware called "Cone 6 Stoneware" from
Trinity Ceramics in Dallas,TX.
The third cylinder is a dark stoneware called "Cinco Rojo" from Armadillo
Clay in Austin,TX.
The Armadillo clays are actually rated for cone 5 but I know potters who use
it at cone 6 without a problem. All of the cone 6 pots on my Lazy B Pottery
page are the Trinity clay.
Bert Gibson
http://home.comcast.net/~lazybpottery
> Hi Bert,
> I'm wondering what the differences among the tiles is. In each
> photo, there are three tests; how do they differ?
>
> Linda
Catherine Yassin on thu 22 jul 04
In a message dated 7/17/2004 12:33:39 PM Central Daylight Time,
lazybbeefmaster@COMCAST.NET writes:
> The Armadillo clays are actually rated for cone 5 but I know potters who
> use
> it at cone 6 without a problem. All of the cone 6 pots on my Lazy B Pottery
> page are the Trinity clay.
Hi Bert! You are right about the Armadillo clays being rated for 5. In fact I
was using the Cinco Blanco ^5 last year and using ^6 glazes on my pieces. At
the same time I was also using ^5 Bee Mix. Since my ^6 glazes actually look
better at almost a ^7 I was having a BIG problem with the Cinco Blanco clay with
pin holing and not getting the sheen and clarity as I did with the Bee Mix. I
talked with Craig at Armadillo clay and he was very accomodating but did
explain that the Cinco Blanco does best at ^5, not ^6. BTW, I enjoyed checking out
your site :)
-Cat Yassin
San Antonio
Bert Gibson on thu 22 jul 04
Hi Catherine,
I didn't use the Cinco Blanco other than the test tiles and actually traded
it away to another potter because I disliked throwing with it so much. I did
like the Cinco Rojo for throwing and will be making some actual pots to see
how the glazes do on the darker clay.
Are you using the "Mastering Cone 6" glazes"? I found that by increasing the
soak time from 20 to 30 minutes and climbing at 350F instead of the 500F in
the book virtually eliminated my pinholing problems. That was the Trinity
cone 6 clay though and I will have to see what kind of issues the Cone 5
Rojo will have.
Bert Gibson
Catherine Yassin wrote:
Since my ^6 glazes
> actually look better at almost a ^7 I was having a BIG problem with
> the Cinco Blanco clay with pin holing and not getting the sheen and
> clarity as I did with the Bee Mix. I talked with Craig at Armadillo
> clay and he was very accomodating but did
> explain that the Cinco Blanco does best at ^5, not ^6.
Catherine Yassin on fri 23 jul 04
In a message dated 7/22/2004 5:56:37 PM Central Standard Time,
lazybbeefmaster@COMCAST.NET writes:
Are you using the "Mastering Cone 6" glazes"? I found that by increasing the
soak time from 20 to 30 minutes and climbing at 350F instead of the 500F in
the book virtually eliminated my pinholing problems. That was the Trinity
cone 6 clay though and I will have to see what kind of issues the Cone 5
Rojo will have
Bert, yes I do use some of the glazes in Mastering Cone 6 Glazes, but even
the Licorice and the Raspberry looked lack luster on the Cinco Blance even with
a long soak. On a white porcelain like clay they looked smoother and were
glossier. I use a ^7 bar in the kiln sitter and also use witness cones, those are
my only temperature gauges. But I find I have to turn the kiln back on when
the sitter trips and I go by my witness cones as to when to soak and finally
turn the kiln off. Good luck with the darker clay, I haven't tried any mid range
dark clays yet with the ^6 glazes.
-Cat Yassin
San Antonio
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