Joyce Lee, Jim Lee on tue 3 dec 96
I deleted the post requesting ^5 transparent/clear because I don't fire
at cone 5, but then I was in the SDSU database and found these ^5
recipies. I think the request was from David.
Joyce
1)
50 Ferro Frit 3134
30 EPK
20 Silica
Totals: 100
Comment Section: "It didn't craze but the colors were not quite as
bright as others but it is a nice glaze and subing Ferro frit 3124, I
found a nice clear matt."
Glaze Name: Clear (Ian Begg)
Cone: 5 and 6
Surface: glossy, shiny
Firing: oxidation
2)
26 Flint
32 Kona F-4 spar
06 Wollastonite
10 OM-4 Ball Clay
16 Frit P-54
10 Whiting
Totals: 100
Comment Section: "In response to questions about cone 5-6 clear glazes
crazing over underglazes...I am ever tweaking this recipe, which is
coming closer to a no-craze, nice soft surface on Hagi porcelain. It is
still not perfect with the tiniest evidence of crazing where thick, and
I'll continue to work with it, suggestions welcome. In the meantime,
Laguna's MS-29 crazes NOT, but its limitations aside from cost and
unknown recipe is in developing a rich color pallette." Curt Huddleston
Glaze name: Clear (Huddleston)
Cone: 5-6
Color: transparent clear
Surface: glossy, shiny
Firing: oxidation
I hope these help. They're all I could find.
Joyce
Basking in the sun in the Mojave
Jonathan Kaplan on wed 4 dec 96
Thought I'd jump in here to suggest that in this temperature range, one
might move away from Ferro 3124 and such and pay a visit with some tests on
Fusion F-38 frit, a strontium frit. You may find this product to be way
more stable at cone 4-6 and provide some fabulous results. Just a hint.
BTW, if you check Tony Hanson, the Insight guy at the IMC homepage
http://digitalfire.com
there is some very well presented and researched material on glaze
formulation at that cone range.
Jonathan
Jonathan Kaplan
http://www.craftweb.com/org/jkaplan/cdg.shtml
(aka "Scooter)
jonathan@csn.net
Ceramic Design Group Ltd./Production Services Voice:
970-879-9139 POB 775112
FAXmodem: same
Steamboat Springs, Colorado 80477, USA CALL before faxing
"Arrive on time, tell the truth, be a good listener, and don't
be too attatched to the results. Above all, maintain a sense of
humor!"
Iain Begg on wed 4 dec 96
Hi
I found another glaze that was developed a couple of years back by
Dinah Collopy (dinah@GN2.GETNET.COM). She wanted a clear
that handled underglazes well as I recall. I know she did countless
tests. Her comments were as follows:
"There were two commercial glazes that worked well--Laguna's MS29 and
Ceramichrome NG 100 (the latter says it contains lead aluminum silicate but
if fired over cone2 meets FDA health requirments for lead release).
These commercial glazes need to be applied VERY thinly.
What I will end up using is the following:
Ferro frit 3292 40
Ferro frit 3124 40
OM4 Ball clay 10
Silica 10 (I used 350mesh)
1/4 of 1% CMC
1/2 of 1% Epson salts
1/4 of 1% Magnesium carb
Mix to specific gravity of 1.5."
Following on from Jonathan Kaplan's post in which he recommended using
Fusion F-38, I checked on the CeramicsWeb and found that this is actually
a Strontium frit, as follows
Ferro Frit 3292
Silica/Alumina ratio: 9.7:1
Equivalent Molecular Weight: 334.600
Molecular Formula of Ferro Frit 3292:
K2O 0.110 Al2O3 0.351 SiO2 3.399
Na2O 0.162 B2O3 0.274
CaO 0.626
MgO 0.058
Li2O 0.045
SrO 0.134
Percentage Analysis
61.49 % SiO2
10.77 % Al2O3
3.12 % K2O
3.02 % Na2O
0.71 % MgO
10.57 % CaO
4.18 % SrO
0.40 % Li2O
5.74 % B2O3
______________
100 % TOTAL
Comments: ? x10-6 Coefficient of expansion
Maybe that explains why the colours are so vibrant....
Iain
Iain Begg begg@mpr.ca
Bearsden Studio, Vancouver, BC
----------
> From: Ceramic Arts Discussion List
> To: Multiple recipients of list CLAYART
> Subject: Cone 5 transparent
> 50 Ferro Frit 3134
> 30 EPK
> 20 Silica
> Totals: 100
>
> Comment Section: "It didn't craze but the colors were not quite as
> bright as others but it is a nice glaze and subing Ferro frit 3124, I
> found a nice clear matt."
>
> Glaze Name: Clear (Ian Begg)
> Cone: 5 and 6
> Surface: glossy, shiny
> Firing: oxidation
>
> 2)
>
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