Ron Roy on thu 25 aug 11
Hi Roxanne,
Send me the recipe and I might be able to reformulate to stop that
problem. Probably needs some ball clay instead of kaolin - makes the
raw glaze tougher as it dries.
It may also be over flocculated - if that is the case epsom salts
would make it worse.
RR
Quoting Roxanne Hunnicutt :
>>
>> So, if a glaze is drying into little chips and falling off during glazin=
g
>
>
> 1. I SHOULD NOT have added CMC as I always do cause that makes it worse,
> RIGHT?
> 2. I should add Epsom salts, RIGHT?
>
> Any other suggestions?
>
Roxanne Hunnicutt on thu 25 aug 11
>
> So, if a glaze is drying into little chips and falling off during glazing
1. I SHOULD NOT have added CMC as I always do cause that makes it worse,
RIGHT?
2. I should add Epsom salts, RIGHT?
Any other suggestions?
paul gerhold on fri 26 aug 11
Neither probably has anything to do with your problem. Issue will be eithe=
r
glaze application or glaze composition.
Paul
On Thursday, August 25, 2011, Roxanne Hunnicutt wrote:
>>
>> So, if a glaze is drying into little chips and falling off during glazin=
g
>
>
> 1. I SHOULD NOT have added CMC as I always do cause that makes it worse,
> RIGHT?
> 2. I should add Epsom salts, RIGHT?
>
> Any other suggestions?
>
William & Susan Schran User on fri 26 aug 11
Sounds like materials in the glaze may have high shrinkage during drying.
If there's lots of clay in the glaze, might want to substitute some calcine=
d
clay. Or if it's a glaze like a crystalline glaze with high percentage of
zinc, then adding CMC does help.
Need to know what the recipe is.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
On 8/26/11 7:34 AM, "paul gerhold" wrote:
> Neither probably has anything to do with your problem. Issue will be eit=
her
> glaze application or glaze composition.
>
> Paul
>
> On Thursday, August 25, 2011, Roxanne Hunnicutt wrote:
>>>
>>> So, if a glaze is drying into little chips and falling off during glazi=
ng
>>
>>
>> 1. I SHOULD NOT have added CMC as I always do cause that makes it worse,
>> RIGHT?
>> 2. I should add Epsom salts, RIGHT?
>>
>> Any other suggestions?
>>
| |
|
