Sabri Justin Douglas Ben-Achour on thu 17 jan 08
Does anyone by chance know what's in Daltile Frit 439? it's the lowest tem=
p frit i've come across (1328F) though it's soluble enough that you have to=
mix up only what you need. I can't find any info on what exaclty is in it =
though.=20
-Sabri
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Need to know the score, the latest news, or you need your Hotmail=AE-get yo=
ur "fix".
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William & Susan Schran User on thu 17 jan 08
On 1/17/08 4:43 AM, "Sabri Justin Douglas Ben-Achour"
wrote:
> Does anyone by chance know what's in Daltile Frit 439? it's the lowest temp
> frit i've come across (1328F) though it's soluble enough that you have to mix
> up only what you need. I can't find any info on what exaclty is in it though.
Several years ago I got a 50 pound bag of this stuff when it was advertised
to be substitute for gerstley borate. Run a bunch of line blends using #439
& EPK. Got a great smooth clear raku glaze using #439 - 80% & EPK - 20%.
Glaze application was good, melted about ^010 - ^08, crazed nicely, then
about two weeks later we discovered what you did - it is soluble.
Spoke to a rep at Daltile in Mexico at the time and he told me they were
having solubility issues that they were working on, but doubted they would
reformulate. I asked what the frit formula was and he wouldn't tell me.
Unless the American supplier would be willing to buy a large quantity of the
frit, they would not reformulate.
So there it stands.
I think the frit must contain a large percentage of a sodium compound, given
the way it crystallized in the bucket, and it would also contain silica, but
beyond that, I'm not certain.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
John Britt on thu 17 jan 08
Sabri,
It is a high boron frit used to sub for gerstely borate. Here is an exerpt
from Digital Fire:
Dal Tile Frit 439 From Mexico
This is a high lime boro-silicate with a melting temperature of 1328=B0F. We=
heard one good report that it worked well in a raku glaze. MileHi Ceramics
reported that it is more fluid that GB. They had pretty good success with
this in Floating Blue, better success a Cream glaze, but it did not work
in Randys Red (produced a green color instead, maybe due to iron silicate
crystallization). Rumors say that will sub well for GB however this is
doubtful because the GB chemistry is soluble in frit form and GB has an
LOI of 25% so a 1 for 1 by weight substitution cannot work. Maybe the
substitution should be 3:4 instead of 1:1? One customer contacted us in
Aug 2002 saying "It is indeed a wonderful really low fire frit. I got
excellent results in raku using it will 20% ball clay. Good smooth melt,
good crackle, stayed suspended in the bucket..... BUT IT'S SOLUBLE! After
a couple weeks in the bucket, just crystallized out. Useless! I contacted
Dal Tile via email and they confirmed it is soluble." If you find out that
they have fixed this or know more please email us at
gerstleyborate@digitalfire.com.
Hope that helps,
John Britt
www.johnbrittpottery.com
John Hesselberth on thu 17 jan 08
Hi Sabri,
It could be this one.
http://ceramic-materials.com/cermat/material/2326.html
Regards,
John
On Jan 17, 2008, at 4:43 AM, Sabri Justin Douglas Ben-Achour wrote:
> Does anyone by chance know what's in Daltile Frit 439? it's the
> lowest temp frit i've come across (1328F) though it's soluble
> enough that you have to mix up only what you need. I can't find any
> info on what exaclty is in it though.
>
> -Sabri
John Hesselberth
www.frogpondpottery.com
"Man is a tool-using animal....without tools he is nothing, with
tools he is all" .... Thomas Carlyle
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