Dolita Dohrman on sat 14 oct 06
Spearmint is one of my favorite glazes. I have used it on many different
claybodies and have yet to dislike any of the results. Even on a chocolate
brown body it comes out a rich, variegated green. I use a slow fire and
slow cool with it. In my opinion, it needs some iron in the clay to bring
out the richness of the glaze. Frogpond, another favorite, I do like on
lighter clay bodies as it is such a beautiful soft, aqua green. Just glazed
10 bowls with it and am very pleased with the results.
Dolita
----- Original Message -----
From: "John and Judy Hesselberth"
To:
Sent: Saturday, October 14, 2006 7:43 PM
Subject: Re: Spearmint Glaze oxides
> Hi Lori,
>
> Happy Birthday!
>
> I'm not familiar with these clay bodies, but Spearmint looks best on
> a white clay body. Tan ones give just enough color that shows through
> the glaze to muddy it. The test you have underway now is a good one.
> Different rutiles can affect the color significantly. TiO2 should
> help you sort that out. There is also some copper carbonate out there
> that gives poor color. If the TiO2 and white clay don't get you close
> you might try buying some copper carbonate from a different supplier.
>
> Good luck,
>
> John
>
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Lori Pierce on sat 14 oct 06
Thanks John...the titanium oxide substituted for rutile gave me a lot of
help; the light colored rutile I used in the other tests with the same copper
produced very similar glazes; now I will juggle the coppers for color value again.
Differing amounts as well as different suppliers. I believe a too high
firing may have been responsible for the lack of freckles and matness. The glaze
was a clear, transparent pale aqua; quite pretty.
Lori Pierce
Orange Park, Fl.
Lori Pierce on sat 14 oct 06
Happy birthday to me! This week I turned eighty and to celebrate have
rejoined Clayart after a too lengthy hiatus.I am still 'in clay' but finding the
roadblocks of RA and age sometimes very frustrating.
I need your help. I have never been successful in replicating the color of
Ron and John's Spearmint Glaze from their wonderful book, Mastering Cone Six
Glazes. I have tested again and again and made interesting glazes from 'new
leaf'' green to dense 'pea soup' in color, but not the look I want. I now have five
copper samples and four rutiles.A titanium test (subsituted for rutile), is
in this current firing.
I am firing in a digital electric Paragon kiln using their prescribed cycle;
the clay bodies are Little Loafers and P5 from Highwater, the water,
distilled. I am eager to talk oxides and sources with someone who has mastered this
glaze recently, using current supplies.
I have missed you all; Many of you had become very dear to me tho I had never
seen your faces. Lori Pierce, Maine Girl Orange Park, Florida. ( used
to be in New Port Richey but now have joined my family just south of
Jacksonville)
John and Judy Hesselberth on sat 14 oct 06
On Oct 14, 2006, at 12:47 AM, Lori Pierce wrote:
> I am firing in a digital electric Paragon kiln using their
> prescribed cycle;
> the clay bodies are Little Loafers and P5 from Highwater,
Hi Lori,
Happy Birthday!
I'm not familiar with these clay bodies, but Spearmint looks best on
a white clay body. Tan ones give just enough color that shows through
the glaze to muddy it. The test you have underway now is a good one.
Different rutiles can affect the color significantly. TiO2 should
help you sort that out. There is also some copper carbonate out there
that gives poor color. If the TiO2 and white clay don't get you close
you might try buying some copper carbonate from a different supplier.
Good luck,
John
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