Dennis Freeman on wed 11 oct 00
I had an experience today with red iron oxide that stumped me, and maybe
someone can explain it to me. I was making a batch of Ohata Khaki glaze
(^10), which called for over 500 g of RIO. I noticed that the iron was not
it's usual red orange color, but had become a little dark and slightly
bluish. When I started to mix the glaze, the RIO would NOT go into
solution, but stayed dry and separate on top of the glaze. Screening didn't
help, and the stuff stayed on top no matter how I treated it. Anyone know
the story here? I mixed a new batch w/ a different package of iron, but I'd
really like to know what was going on here. Thanks in advance - Dennis in
Wyo.
Steve Mills on thu 12 oct 00
We've had the same problem in the past with copper carbonate. It appears
that during the manufacturing process some form of grease got into the
mix. The cure was a small amount of washing up liquid in the glaze.
Steve
Bath
UK
In message , Dennis Freeman writes
>I had an experience today with red iron oxide that stumped me, and maybe
>someone can explain it to me. I was making a batch of Ohata Khaki glaze
>(^10), which called for over 500 g of RIO. I noticed that the iron was not
>it's usual red orange color, but had become a little dark and slightly
>bluish. When I started to mix the glaze, the RIO would NOT go into
>solution, but stayed dry and separate on top of the glaze. Screening didn't
>help, and the stuff stayed on top no matter how I treated it. Anyone know
>the story here? I mixed a new batch w/ a different package of iron, but I'd
>really like to know what was going on here. Thanks in advance - Dennis in
>Wyo.
>
--
Steve Mills
Bath
UK
Dennis Freeman on thu 12 oct 00
on 10/13/00 8:21 AM, Robert Marshall Simpson at rsimpson@TEXHOMA.NET wrote:
> Dennis
>
> It sounds like you are using red copper oxide instead of RIO. When I first
> started making glazes the only copper I had was the red and it acted that
> way until I started mixing a tad of dish washing soap into the glaze mix.
>
> Kayte---waiting for rain in Oklahoma
> ----- Original Message -----
> From: "Dennis Freeman"
> To:
> Sent: Wednesday, October 11, 2000 6:17 AM
> Subject: funky iron oxide
>
>
>>
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Thanks! Yep, I get to wear that "stoopid" sign this week! - Dennis in Wyo.
Tommy Humphries on thu 12 oct 00
Kinda sounds like you grabbed red copper oxide instead of the red iron
oxide. Might ought to check the bag again...
Tommy Humphries
----- Original Message -----
From: "Dennis Freeman"
To:
Sent: Wednesday, October 11, 2000 6:17 AM
Subject: funky iron oxide
> I had an experience today with red iron oxide that stumped me, and maybe
> someone can explain it to me. I was making a batch of Ohata Khaki glaze
> (^10), which called for over 500 g of RIO. I noticed that the iron was
not
> it's usual red orange color, but had become a little dark and slightly
> bluish. When I started to mix the glaze, the RIO would NOT go into
> solution, but stayed dry and separate on top of the glaze. Screening
didn't
> help, and the stuff stayed on top no matter how I treated it. Anyone know
> the story here? I mixed a new batch w/ a different package of iron, but
I'd
> really like to know what was going on here. Thanks in advance - Dennis in
> Wyo.
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
Robert Marshall Simpson on thu 12 oct 00
Dennis
It sounds like you are using red copper oxide instead of RIO. When I first
started making glazes the only copper I had was the red and it acted that
way until I started mixing a tad of dish washing soap into the glaze mix.
Kayte---waiting for rain in Oklahoma
----- Original Message -----
From: "Dennis Freeman"
To:
Sent: Wednesday, October 11, 2000 6:17 AM
Subject: funky iron oxide
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
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