Cynthia Bracker on wed 2 jun 04
I have a customer originally from Finland, now living in the states.
She LOVES something called FFF feldspar, which she thinks stands for
Finnish Floated Feldspar, but it could stand for something else. Anyone
know anything about it? A US Source? or a European Source that would
ship small amounts to the US? (not a skid) A US equivalent?
Thanks
Cindy
Antoinette Badenhorst on thu 3 jun 04
Cindy, I was curious about this and checked it out on the net. There are
much more info on this feldspar available when you search google. I see
it was also discussed previously on clayart, so you will find more in
the archives. What I found when I came to the US, was that most
feldspars worked well with my glaze recipes. I ended up with Custer and
g-200 and now I've learned that one of the two will work fine. Of cause
that is potash. For a sodium spar I adjusted to minispar(there was
another one that I can not remember the name of now that worked just as
fine)
(http://www.spminerals.ru/shpat_eng.htm)FFF is sodium-potassium feldspar
in which the good reactivity of sodium feldspar and the high quality
finish of potassium feldspar are combined. This is well demonstrated by
the common use of FFF-feldspar in high-demanding applications such as
sanitary ware glazes.
3248- FFF Feldspar- K2O.Al2O3.6SiO2- 556- Major flux
http://www.scarvapottery.com/download/1/FORMULAE.DOC)
Good luck with all the adjustments.
Antoinette Badenhorst
105 Westwood Circle
Saltillo MS
38866
662 869 1651
www.clayandcanvas.com
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Cynthia
Bracker
Sent: Wednesday, June 02, 2004 4:33 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Finnish (?) Feldspar?
I have a customer originally from Finland, now living in the states.
She LOVES something called FFF feldspar, which she thinks stands for
Finnish Floated Feldspar, but it could stand for something else. Anyone
know anything about it? A US Source? or a European Source that would
ship small amounts to the US? (not a skid) A US equivalent?
Thanks
Cindy
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mailtoandrew@FSMAIL.NET on thu 3 jun 04
Hi Cindy,
There are two popular grades of FFF.
K6 is high purity mixed spar whilst K8 is a high purity potash rich spar.
Typical chemical analyses being:
K6 grade
SiO2 67.5
Al2O3 18.4
Fe2O3 0.11
TiO2 0.01
CaO 0.8
MgO 0.01
K2O 6.4
Na2O 5.9
LOI 0.2
K8 grade
SiO2 66.2
Al2O3 19.3
Fe2O3 0.10
TiO2 0.01
CaO 1.3
MgO 0.01
K2O 8.2
Na2O 4.8
LOI 0.3
As far as a match in the US try Minspar blended with a little Custer
feldspar. If you get hold of the typical analyses you should be able to
calculate the most suitable before trying for real.
And yes FFF does stand for Finnish Floated Feldspar.
Hope that helps,
Andrew,
Steve Mills on thu 3 jun 04
Dear Cynthia,
That description sounds about right. It is a mixed Feldspar commonly
available in the UK.
The analysis taken from David Hewitt's excellent BPS Raw Materials
Database on our website at:
is as follows:
RM Name Feldspar
BPS Code FFF
SiO2 67.70
Al2O3 18.90
Fe2O3 0.16
CaO 0.72
K2O 7.62
Na2O 4.85
LOI 0.05
Its proper name is FFF.
Steve Mills
BPS
Bath
UK
In message , Cynthia Bracker writes
>I have a customer originally from Finland, now living in the states.
>She LOVES something called FFF feldspar, which she thinks stands for
>Finnish Floated Feldspar, but it could stand for something else. Anyone
>know anything about it? A US Source? or a European Source that would
>ship small amounts to the US? (not a skid) A US equivalent?
>Thanks
>Cindy
--
Steve Mills
Bath
UK
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