Ann Brink on wed 12 feb 03
Hi Diane,
Would you believe only 2 ingredients? I saw this recipe years ago in an =
old 1964 Ceramics magazine, in an article by Glen Lukens.
65 grams feldspar
40 grams Gerstley borate
Fire to 05. As you say,. this is ready for opacifier, and the various =
oxides. I have used it on low-fire earthenware- not the white low-fire =
clay. I never like the way the white low-fire clay looks, acts, or =
anything about it, but maybe that's just my blind spot. It always seems =
so "raw". Oh, well, I'm giving you more than you asked for here...good =
luck! If you don't have Gerstley borate, you might try a borate frit.
Ann Brink in Lompoc
----- Original Message -----=20
From: Diane Lamb-Wanucha=20
I'm looking for a low fire base glaze formula with about three =
ingredients. I could use this with students to help them understand the =
composition of glaze and what makes glazes different. We could =
experiment with additions for color and texture. Also does anyone have =
information for a formula that uses teaspoon measurements for glaze =
formulas?
Thank you, Diane
Pat Southwood on thu 13 feb 03
Diane,
Dora Billington transparent is a lovely glaze, and with the addition of =
tin and oxides they could play for ages. Not sure if you have this stuff =
where you are, lead bi. is fritted btw.
Lead Bisilicate 85
cornish stone 15
Pat.
Lily Krakowski on thu 13 feb 03
Do you mean low fire as in c.04, c.1, c.4, c.6?
Two-ingredient glazes are found in GLAZE PROJECTS by Richard Behrens. This
is a Ceramics Monthly Handbook, still in print. He also has a bunch of
recipes for by-volume glazes. A lot of his recipes call for spodumene(
lithium containing spar) and barium...the latter is a serious classroom
no-no, the other opinion seems to be divided on. I would not use.
And, if you look in Pottery Making Illustrated, Summer 1999, p36-37, you
will find a bunch of by measure recipes. They all are c.6.
Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389
Be of good courage....
Bruce Girrell on thu 13 feb 03
> I'm looking for a low fire base glaze formula with about three
ingredients.
> I could use this with students to help them understand the composition of
glaze > and what makes glazes different. We could experiment with additions
for color > and texture.
I recommend that you get a copy of Ian Currie's book _Revealing Glazes -
Using the Grid Method_ (see http://ian.currie.to/index.html). I know of no
other method that can demonstrate the interaction between the ingredients so
clearly.
The method is built around the concept of having three ingredients: a flux,
a silica source, and an alumina source. The choice of flux controls the
desired firing temperature. Colorants are a secondary variable. Typically
you would hold the colorant(s) constant for each grid.
The grid method can be tedious for a single person, but makes a great team
project because you can have different people getting ingredients, weighing,
recording, dispensing, checking, etc. I would recommend that you make up a
set of grid tiles ahead of time, though, so that the students can start at
the point where things become interesting.
> Also does anyone have information for a formula that uses teaspoon
> measurements for glaze formulas?
There is no reason that you can't use a weight-based recipe as a starting
point for a volume- (teaspoon-) based recipe. The results won't exactly
match the weight-based glaze, but you only need a starting point anyway.
Don't even try to convert the weights. If the recipe calls for 50 parts
Gerstley borate, 30 parts neph sy, and 20 parts EPK, there's no reason you
can't use 50 teaspoons Gerstley borate, 30 teaspoons neph sy, and 20
teaspoons EPK. Again, the results woun't be exactly the same as the
weight-based version, but there are a lot of other variables (your
particular clay, your glaze application, your firing schedule, ...) that
probably add more variation that the difference between weight-based and
volume-based measurement.
On the other hand, this would be a wonderful opportunity to introduce your
class to the advantages of the metric system. Metric measurements make glaze
recipe modifications so much easier.
With Currie's grid method you can easily see the eutectic region of the
glaze ingredient combination, you can discover glazes with character that
you would have never thought to test if it had not just been part of the
process, and you can clearly see how the changing relationship of
flux/silica/alumina works. It is a great teaching tool.
Bruce "this Grid's for you" Girrell
Diane Lamb-Wanucha on thu 13 feb 03
I'm looking for a low fire base glaze formula with about three ingredients. I could use this with students to help them understand the composition of glaze and what makes glazes different. We could experiment with additions for color and texture. Also does anyone have information for a formula that uses teaspoon measurements for glaze formulas?
Thank you, Diane
The new MSN 8: smart spam protection and 2 months FREE*
Brian on thu 13 feb 03
On 13/2/03,you wrote...
>Also does anyone have information for a formula that uses
>teaspoon measurements for glaze formulas?
Diane,
Teaspoons,cups,buckets,boots........techniques all covered in the
clayglazexplore/gumboot link in the website.
for earthenware make sure that one of the teaspoons is a frit
for stoneware just mix anything with anything
....pinch of any stain increases the adventure
no need to sieve just stir a thick mixture and a thin mixture in a
plastic cup and pour into little clay pinch pots or boxes......
Brian
--
ceramic desigNZ
http://www.gartside.info
Stephani Stephenson on thu 13 feb 03
I would second the recommendation for Ian Currie's Grid method.
I wish I had learned about it when I started out .
It gives you a mental as well as a physical framework so that , as you
piece together
your materials and your discoveries, you can begin to glimpse and grasp
a larger understanding.
Plus, in it's elegant way, it turns perhaps 100 hours of testing
methodically but randomly, into 5 hours. .
however, that said
an old standby 3 ingredient glaze is the Carlton Ball base for cone 06-
04
frit 3134 70
EPK Kaolin 15
Silica 15
Stephani Stephenson
steph@alchemiestudio.com
Carlsbad CA
NCECA restaurants , info and CLAYART faves
Also links up to the NCECA events and exhibits webpage.
http://www.alchemiestudio.com/sandiegoclayartfaves.htm
Online version of the San Diego Historic Tile and Architectural
Ceramics, Self Guided Tour: http://www.alchemiestudio.com/nceca.htm
Peter and Samantha Tomich on fri 14 feb 03
Out of the Earth and Into the Fire by Mimi Obstler has a lot of short
recipes where she's changed ingredients and given the outcome of the firing,
for instance:^ 5-6 ox
Neph Sy 100 stoney surface
Neph sy 90 and
10 whiting semi-opaque. satin surface. even coverage. High craze
Neph sy 80
Colemanite 20 High gloss transparent
Hope this helps. this book seems right up your alley.
Samantha Tomich
Waikoloa, Hawaii
peter.sam@verizon.net
HYPERLINK "http://s_a_m.tripod.com/pottery.html"
\nhttp://s_a_m.tripod.com/pottery.html
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Diane
Lamb-Wanucha
Sent: Wednesday, February 12, 2003 3:09 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Looking for a 3 ingredient glaze
I'm looking for a low fire base glaze formula with about three ingredients.
I could use this with students to help them understand the composition of
glaze and what makes glazes different. We could experiment with additions
for color and texture. Also does anyone have information for a formula that
uses teaspoon measurements for glaze formulas?
Thank you, Diane
_____
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