Ama Menec on sun 23 may 04
I'm sending this again as although I got an acknowledgement, it hasn't been
posted back on the list....or I've got clayart emails missing!?
Ama
----- Original Message -----
From: "Ama Menec"
To: "Clayart"
Sent: Saturday, May 22, 2004 12:30 AM
Subject: Re: Glaze softwares and American Materials.
> Thank you Ron, Jon, Jacqui and Lawrence for your help. Particularly for
> analyses of materials which don't appear on the Gaydos website. That is
> fantastically helpful.
>
> I'm awaiting a second copy of the Ceramdat software and David Hewitt has
> been so kind as to decode the first glaze on my list so I can get on and
> test it properly in the meantime. I'll let Clayart know how the software
> goes when/if I manage to crack it.
>
> It seems half the problem is getting a software with an extensive enough
> list of local, and international, glaze materials already on it, as
> searching around on the internet for unfamiliar foreign materials'
analyses
> can be very time consuming, (thank goodness for Clayart and the generosity
> of its potters is all I can say). I liked the idea of the Matrix software
> from that point of view as it seems to have add on lists for particular
> countries.
>
> I'll continue checking out other softwares if the Ceramdat and I don't get
> on, and I'll let you all know how it goes. In the meantime I really
welcome
> your suggestions and experience with ceramic softwares. Thank you,
>
> Ama, Devon, UK.
>
>
> ----- Original Message -----
> From: "Ron Roy"
> To:
> Sent: Friday, May 21, 2004 6:48 PM
> Subject: Re: Glaze softwares and American Materials.
>
>
> > The analysis for Cady Cal is given in a range of percents - I have
> averaged
> > them and use this for calculating.
> >
> > B2O3 - 46.49
> > SiO2 - 0.73
> > Fe2O3 - 0.06
> > CaO - 25.67
> > Na2O - 0.1
> > Al2O3 - 0.15
> > K2O - 0.1
> > MgO - 0.26
> > SrO - 0.03
> > LOI - 24.7 (Loss on ignition)
> > Total 98.29
> >
> > The CadyCal 100
> > Fort Cady Minerals Corp
> > P.O. Box Newberry Springs,
> > CA 922365 - USA
> > Fax - 760-257-4085
> >
> >
> >
> >
> > I try to keep the amount of CadyCal in any glaze below 10% - if more is
> > used the glaze can thicken (Flocculate) over time with the attendant
> > problems.
> >
> > RR
> >
> > Ron Roy
> > RR#4
> > 15084 Little Lake Road
> > Brighton, Ontario
> > Canada
> > K0K 1H0
> > Phone: 613-475-9544
> > Fax: 613-475-3513
> >
> >
>
____________________________________________________________________________
> __
> > 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 mon 24 may 04
Hi Roger,
To be perfectly honest - I don't know - have never heard of a settling
problem either. The situation I experienced was a thickening - like pudding
after a few weeks.
Perhaps the high LOI is from the CaO which is present as CaCO3. CaCO3 has
an LOI of about 45%.
I would think - the right amount if defocculator would perhaps be of use -
make for a good experiment. I would suggest Darvan as it has a greater
range than Sodium silica and soda ash.
I would be happy to work with you on this if you have a mind to persue it.
RR
>Is the flocculation and subsequent settling due to the carbonates that
>make up the high LOI or some other factor? I have this problem,
>particularly when using Cadycal 100 in glossy -> low clay -> low alumina
>glazes.
>
>Curious,
>Roger
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Roger Korn on mon 24 may 04
Ron,
Is the flocculation and subsequent settling due to the carbonates that make up the high LOI or some other factor? I have this problem, particularly when using Cadycal 100 in glossy -> low clay -> low alumina glazes.
Curious,
Roger
You wrote:
----- Original Message -----
> From: "Ron Roy"
> To:
> Sent: Friday, May 21, 2004 6:48 PM
> Subject: Re: Glaze softwares and American Materials.
>
>
>> > The analysis for Cady Cal is given in a range of percents - I have
>
>
> averaged
>> > them and use this for calculating.
>> >
>> > B2O3 - 46.49
>> > SiO2 - 0.73
>> > Fe2O3 - 0.06
>> > CaO - 25.67
>> > Na2O - 0.1
>> > Al2O3 - 0.15
>> > K2O - 0.1
>> > MgO - 0.26
>> > SrO - 0.03
>> > LOI - 24.7 (Loss on ignition)
>> > Total 98.29
>> >
>> > The CadyCal 100
>> > Fort Cady Minerals Corp
>> > P.O. Box Newberry Springs,
>> > CA 922365 - USA
>> > Fax - 760-257-4085
>> >
>> >
>> >
>> >
>> > I try to keep the amount of CadyCal in any glaze below 10% - if more is
>> > used the glaze can thicken (Flocculate) over time with the attendant
>> > problems.
>> >
>> > RR
>
--
McKay Creek Ceramics
In OR: PO Box 436
North Plains, OR 97133
503-647-5464
In AZ: PO Box 463
Rimrock, AZ 86335
928-567-5699
| |
|
