Jacqueline Miller on mon 7 jul 08
A friend inherited some Spanish Iron oxide. We were doing some
preliminary glaze testing and the glazes did not turn out as we
expected. How does Spanish iron oxide differ from red iron? We will
get some RIO and retest, but I am curious.
Jackie
--
Jackie Miller
JackieAMiller@gmail.com
Larry Kruzan on tue 8 jul 08
I was told once that Spanish I/O was less potent as a colorant - I am really
sticking my neck out here since I had no data to support this assumption.
It seems more brown than red to me.
I really hope somebody who knows can answer this since it is on my list of
unanswered questions too.
How about it folks?
Larry Kruzan
Lost Creek Pottery
www.lostcreekpottery.com
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Jacqueline
Miller
Sent: Monday, July 07, 2008 7:41 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: [CLAYART] Spanish Iron Oxide
A friend inherited some Spanish Iron oxide. We were doing some
preliminary glaze testing and the glazes did not turn out as we
expected. How does Spanish iron oxide differ from red iron? We will
get some RIO and retest, but I am curious.
Jackie
--
Jackie Miller
JackieAMiller@gmail.com
Steve Slatin on tue 8 jul 08
IIRC, Spanish Red is from 83 to 88% RIO.
"Regular" RIO is more like 98% -- I've
used it as a sub once or twice, and it
seems increasing the quantity of iron
by 15% or thereabouts is a starting point.
Steve Slatin --
--- On Mon, 7/7/08, Jacqueline Miller wrote:
> From: Jacqueline Miller
> Subject: Spanish Iron Oxide
> To: CLAYART@LSV.CERAMICS.ORG
> Date: Monday, July 7, 2008, 5:41 PM
> A friend inherited some Spanish Iron oxide. We were doing
> some
> preliminary glaze testing and the glazes did not turn out
> as we
> expected. How does Spanish iron oxide differ from red iron?
> We will
> get some RIO and retest, but I am curious.
>
> Jackie
>
> --
> Jackie Miller
> JackieAMiller@gmail.com
John Rodgers on wed 9 jul 08
I have used both the bright red RIO and the brownish RIO, and the bright
read performed better. I work with Chappelle's Floating Blue over C-5 B
Mix and the bright red RIO content makes a much nicer finish. The glaze
breaks brown where thin, and the brownish effects of the bright red RIO
looks better.
My $0.02.
John Rodgers
Chelsea, AL
Jacqueline Miller wrote:
> A friend inherited some Spanish Iron oxide. We were doing some
> preliminary glaze testing and the glazes did not turn out as we
> expected. How does Spanish iron oxide differ from red iron? We will
> get some RIO and retest, but I am curious.
>
> Jackie
>
> --
> Jackie Miller
> JackieAMiller@gmail.com
>
>
>
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