[Clayart] Bisque Firing High-fired pots.

[ronroy at ca.inter.net]

I remember the photograph of that kiln load of red pots. The problem  
is - those porcelain pots did not seem to shrink during the glaze  
fire. Every pot I ever fired to glaze temperature left a sizable gap  
under the shelf above it.

Truth in advertising?

RR


Quoting David Woof <woofpots at hotmail.com>:

> 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.
>
> Misneach,
> 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
> https://www.saultman.com
> 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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Ron Roy
ronroy at ca.inter.net
Web page ronroy.net