Hal Mc Whinnie on fri 3 oct 03
HAL'S TUROQUISE GLOSS
CONE 5-6
a3 feldspar 34.9
frit 25 25
silica 25
whiting 5
copper carb. 3
na2 0.24
k2o 0.20
cao 0.56
p2o3 0.32
al2o3 0.38
sio2 2.88
expansion 0.341
Charles Moore on fri 3 oct 03
Hi, Hal,
What is "a3 feldspar?" Can one substitute another feldspar if the spar that
you cite is not available?
Charles
Sacramento
----- Original Message -----
From: "Hal Mc Whinnie"
To:
Sent: Friday, October 03, 2003 8:57 AM
Subject: glaze for week oct 3
> HAL'S TUROQUISE GLOSS
> CONE 5-6
>
> a3 feldspar 34.9
> frit 25 25
> silica 25
> whiting 5
> copper carb. 3
>
> na2 0.24
> k2o 0.20
> cao 0.56
>
> p2o3 0.32
> al2o3 0.38
> sio2 2.88
> expansion 0.341
>
>
____________________________________________________________________________
__
> 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.
>
Hal Mc Whinnie on sat 4 oct 03
a3 feldspar is a standarad potash spar
you can substitute but that will change the ratios.
the glaze should work
hal
Ababi on sat 4 oct 03
At
http://www.digitalfire.ab.ca/cermat/ceramicmaterials/material.php
You can see the analysis
Ababi
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Hal Mc
Whinnie
Sent: Saturday, October 04, 2003 2:53 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: glaze for week oct 3
a3 feldspar is a standarad potash spar
you can substitute but that will change the ratios.
the glaze should work
hal
________________________________________________________________________
______
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.
Ron Roy on tue 7 oct 03
This glaze totals 89.9 without the copper - is that correct?
I used G200 to calculate - both G200 and Custer have more KNaO than A3 Spar
so it would be best to calculate the substitution.
The Unity formula below shows P2O3 at 0.38 - that should be B2O3.
It is difficult to say if this is a stable glaze - the silica and alumina
are very high for a cone 6 glaze but so is the KNaO.
If it is durable you will find out by having it tested - copper is well
known for promoting leaching so it is not obviously a stable glaze - might
be.
RR
>What is "a3 feldspar?" Can one substitute another feldspar if the spar that
>you cite is not available?
>
>Charles
>Sacramento
>----- Original Message -----
>From: "Hal Mc Whinnie"
>To:
>Sent: Friday, October 03, 2003 8:57 AM
>Subject: glaze for week oct 3
>
>
>> HAL'S TUROQUISE GLOSS
>> CONE 5-6
>>
>> a3 feldspar 34.9
>> frit 25 25
>> silica 25
>> whiting 5
>> copper carb. 3
>>
>> na2 0.24
>> k2o 0.20
>> cao 0.56
>>
>> p2o3 0.32
>> al2o3 0.38
>> sio2 2.88
>> expansion 0.341
>>
>>
>____________________________________________________________________________
>__
>> 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.
>>
>
>______________________________________________________________________________
>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.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
| |
|
