Ama Menec on wed 19 may 04
Hi ClayArters,
I have been trying to convert some American ceramic materials into =
equivalent UK ones, (or into combinations of UK materials), using =
Ceramdat software. Unfortunately I am have some major technical =
difficulties with it, (I've emailed David Hewitt, Ceramdats' maker, and =
am awaiting reply; I suspect my computer and it are incompatible), and =
wondered what glaze software, if any, other people are using? None of =
the potters I know use glaze software, and I wouldn't be considering it =
either if it wasn't for trying to replicate some American 06 glazes. I =
can do glaze to formula and formula to recipe, the long way, if I have =
to, but the prospect of chemically re-creating American materials is =
defeating me!
The materials I'm trying to Anglicise are:
Cady cal (what is this?)
Frit 3110
Custer Feldspar
Lagunas Borate
Frit P25
CMC (a binder, I gather, but what??)
F4 Feldspar
Frit 3124
Frit 3195
Frit 3134
Ferro frit 2508
Ferro frit 4363
and most importantly Frit 3403.
Can anyone recommend a glaze software that can help with this task? I =
want to get as near a chemical match as possible, and not just guess at =
an approximate i.e. frit 3403 is a lead frit; I've tried the recipe with =
lead bisilicate and it was good but not fantastic. Looking at the =
molecular formula for 3403 I see it's somewhere between a lead =
bisilicate and sequisilicate; it hurts my head too much to work out the =
proportions of each I should use, and hope a computer programme can help =
me with the maths and chemistry! Any suggestions?
Ama Menec, Devon, UK.
kruzewski on wed 19 may 04
Dear Ama,
I have John Hesselberth's GlazeMaster.
I was one of the testers of this program and feel sure it will easly do what
you want. John has already included a database of USA materials with all the
formulas - so all you have to do is enter UK materials with formulas into
the database. You can then compare materials till you find and equivalent.
You can also enter the USA recipe then, along side it, you can build up a
"new" recipe with UK materials until the formula is very similar. I have
successfully done this.
Look at www.masteringglazes.com for more information.
The usual disclaimer applies. I have no financial connection or interest in
this product beyond being one of the original testers and finding it works
for me - having also converted USA recipes to UK ingredients.
Jacqui
North Wales
----- Original Message -----
From: "Ama Menec"
To:
Sent: Wednesday, May 19, 2004 10:34 PM
Subject: Glaze softwares and American Materials.
,
Can anyone recommend a glaze software that can help with this task? I want
to get as near a chemical match as possible, and not just guess at an
approximate
Edouard Bastarache Inc. on wed 19 may 04
Ama,
Cadycal may be replaced by Fritte Richoux # P-2954,
sold by Richoux SA in Orly in the suburb of Paris :
http://www.cer.richoux.net/default_zone/fr/html/page-3.html
a.wewerka@richoux.net
Later,
"Ils sont fous ces quebecois,
and "Vive La French Connection"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
http://www.digitalfire.com/education/toxicity/
Russel Fouts on thu 20 may 04
Ama
Hi ClayArters,
>> I have been trying to convert some American ceramic materials into equivalent UK ones, (or into combinations of UK materials), using
Ceramdat software. <<
I would be particularly interested in anything you came up with for
substitutions for the following:
Ferro Frit 3110
Ferro Frit 3124
Ferro Frit 3195
Especially the latter two and especially, especially the 3124 since it's
60% of the glaze I'm currently using and is VERY EXPENSIVE here.
Thanks in advance.
Russel
-----------------------------
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Mes Potes & Mes Pots
Brussels, Belgium
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May Luk on thu 20 may 04
Hi Ama and friends;
I had converted american recipes with Glazemaster. I had David Hewitt's
glaze workbook but I switched because I needed something more Mac friendly.
I heard good things about Ceramat [too bad is only for PC only] The only
thing with american software is that you have to input all the local
materials yourself.
I found it difficult to sub material one to one. The clay, especially, are
very different. I have to calculate the recipe as a whole and play with
combination of materials.
I export all the materials and then organized them in excel so that I can
have a quick overview on paper. It takes some time, but it's worth the
effort.
I had sub Frit 3134 with Calcium Borate frit together with some spar and
have ok results.
Cady Cal[100] looks a bit like Colemanite [from Bath Potters Supplies.]
Custer Feldspar is similar to Potash Feldspar [Norfloat] or from Bath
Potters Supplies.
F4 is a soda Feldspar, I can't see anything that's closely matched. UK soda
spar has a tad more Na2O.
Check with Bath Potters Supplies, they sell 4 kinds of American Ferro Frits.
You have to get up to date analysis from your supplier. It takes some time
to get them, but it's always good, you learn something from talking to them.
I always do.
Write me off list and we can exchange ideas. I'm always fuzzing with some
glaze recipes.
May
London, UK
mailtoandrew@FSMAIL.NET on thu 20 may 04
Hello Ama,
Just a few things which may be of help:
CMC is an acronym for carboxymethyl cellulose, and is not specific to the
US market. CMCs are a family of water soluble, long chain polymer
cellulose derivatives. Although many, many different types are produced
which have different properties and uses a decent ceramic material
supplier should have a suitable grade.
Direct substitutes of the two feldspars you note are not available in the
UK. However as May has already suggested Norfloat potash is not a bad
start instead of Custer, though as the former is a slightly stronger flux
less will be needed.
K4 is a mixed rather than a soda feldspar so try to go for something with
near equal K2O and Na2O, though if possible with slightly more Na2O.
However the feldspars available in the UK never have CaO as high as found
in many of the US spars such as K4 which makes a match much more
difficult. Forshammar feldspar is mixed spar widely sold in the UK,
although with an alkali content less than K4 it ahs a milder action. Try
adding a little more or better still blending it with a small amount of a
high purity Na spar.
For a quick reference typical alkali contents of the above are
K4
K2O 4.8
Na2O 6.9
CaO 1.7
Forshammar
K2O 4.2
Na2O 4.8
CaO 0.2
Custer
K2O 10.0
Na2O 3.0
Norfloat potash
K2O 11.8
Na2O 2.9
Process to match.
1. Identify those materials needed, including the typical analyses.
2. Identify what materials are available, including analyses.
3. Undertake calculations of the best match of the analyses of those
mixtures of available materials.
4. Small trials to assess performance followed by any modification.
Hope thats of some use,
Andrew
Bonnie Staffel on fri 21 may 04
When I taught in Denmark, I was faced with finding substitutions for
materials needed by my glaze recipes. I had the formula of my frits and
then looked up the formula for the UK/Danish frits. By comparing the basic
ingredients/chemicals, I was able to make successful glazes with these frits
for the students to work with as I found some were close enough to provide
the needs of the glaze. Just used common sense and since the kiln was very
large, could not test. Sure did give me new confidence as to working with
glazes in another country. I had no computer to assist my work at that
time.
Regards,
Bonnie Staffel
http://pws.chartermi.net/~bstaffel/default.html
http://www.vasefinder.com/
Ron Roy on fri 21 may 04
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
Ama Menec on sat 22 may 04
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
>
>
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