[Clayart] Bisque Firing High-fired pots.

David Woof woofpots at hotmail.com
Thu Aug 25 05:26:48 UTC 2022

My point exactly Dan,
and Bill S. told of a pot he intended to be red, but which came out Brown.  In a subsequent refire at ^04 bisque he got the red.

Brings to mind the Coleman's kilns full of copper reds some 20 or so years ago.
As the story goes: it was noticed that all the pots glazed for copper red were white at peak temperature, but turned red during controlled cool down.

We have to be alert to question and hunt down everything unexpected and unusual.

David Woof.....................................................................................................
From: Clayart <clayart-bounces at lists.clayartworld.com> on behalf of Dan Saultman <design at saultman.com>
Sent: Tuesday, August 23, 2022 2:48 PM
To: Clayart international pottery discussion forum <clayart at lists.clayartworld.com>
Subject: Re: [Clayart] Bisque Firing High-fired pots.

I have a turquoise glaze that when refired at bisque 07-06
turns gray.  I had a couple mugs to try - the gray ones sold promptly.
Half & half blue and gray.

Dan Saultman
Saultman Design, Inc.
Art & Ceramic Home Decor
Clinton Twp., MI

> On Aug 23, 2022, at 3:33 PM, David Woof <woofpots at hotmail.com> wrote:
> With experience and lucid care, one usually has a high percentage of firing success.
> But for the rare disappointments, one could save a number of these glaze firing "wasters" by refiring at a lower temp.
> ^04 seems to be a common magic number.
> Fussing around with a re-glazing hope can lead to something good, or to "worse bad."
> But.....What does it cost just to put that dunker back in the next bisque?
> Sometimes there is also something to be learned by putting a perfectly acceptable pot back thru the next Bisque just to see "what would happen if."
> Learning does not have a vanishing point from a professional potter's perspective.
> Misneach,
> David Woof
> ****************************************************************************
> ________________________________
> From: Clayart <clayart-bounces at lists.clayartworld.com> on behalf of William Schran <wschran at twc.com>
> Sent: Monday, August 22, 2022 2:50 PM
> To: 'Clayart international pottery discussion forum' <clayart at lists.clayartworld.com>
> Subject: Re: [Clayart] Bone ash?
> Yes, Tricalcium Phosphate will also work.I also discovered an iron
> saturated glaze does well with a controlled cooling.Many years ago
> before I learned about downfiring I had a large pot with iron red
> glaze that came out brown. I put the pot in a bisque firing to cone 04
> and it came out red!
> Bill
> William Schranwschran at twc.com703-505-1617
>        -----------------------------------------From: "ran mcc"
> To: "ClayArt"
> Cc:
> Sent: Monday August 22 2022 4:13:55PM
> Subject: [Clayart] Bone ash?
> Will added bone ash to a glaze make an iron glaze more red instead of
> brown? If not what will?
> Get Outlook for Android
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