Glenn Minards on wed 4 oct 00
Richard Behrens mentions Fluoride glazes and their effect on colour in his
Ceramic Monthly Handbook.Can anyone provide me with 04-06 glaze recipies
using fluoride fluxes as well as books or publications that contain
comprehensive information on these types of glazes.Thankyou.Glenn Minards
Milton Markey on thu 5 oct 00
In a message dated 10/4/00, Glenn writes:
> Richard Behrens mentions Fluoride glazes and their effect on colour in his
> Ceramic Monthly Handbook....
===============================
Hi Glenn!
Which Behrens handbook do you own? He wrote two or three booklets, published
by CM, two of which have examplary recipes of fluoride-based glazes.
Fluoride ingredients (lepidolite and cryolite are two such chemicals) are
usually used for "crater" glazes. However, these ingredients will also help
produce glazes that don't "crater."
I checked my copy of "Ceramic Glaze Making." On page 36 are two cone 6
glazes with cryolite. I've not tried these, but I hope you will mix Glaze
III, and report to the list your results! For those not possessing the book,
here they are (Note that I'm copying these verbatim):
Glaze III (Cone 6)
(A bright, slightly stony glaze)
Whiting--1.6%
Cryolite---8.4%
Barnard Clay---90%
Add: Bentonite--2%
Glaze IV (Cone 6)
(A bright, light brown glaze)
Cryolite---11%
Albany Slip (note--now extinct)---89%
Add: Bentonite--2%
Like many good ceramic glaze books, this one is a bit outdated. Albany Slip
is no longer available; hence, Glaze IV is not produceable. I'm certain there
are other updated recipes with cryolite (lepidolite is also no longer
available, at least in the USA), or other fluoride products, in the archives.
Best wishes to you!
Milton NakedClay@AOL.COM
A little thunder in the distance, perhaps ready to accompany rain over
Arizona. Like the cloud formations this summer, these clouds move right over
my neck of the Mojave Desert, with little or no precipitation.
Al Sather on wed 13 dec 00
I was looking a some of the fluoride glazes that Richard Behrens
presented
in his CM handbook "Glazes Project".
I am having problems locating Lepidolite, but have heard that
spodumene
may be
a substitute. Anyone have an idea how to do the substitution.
Or, is it
the old "Try
it until it works!"
While I am planning to use these as sculptural glazes, would
they work
as
functional glazes?
Bright Patterned Glaze ^6
Lepidolite 64.5
Fluospare 35.5
+Bentonite 2
Patterned Glaze ^6
Zircopax 35
Fluospare 50
China Clay 15
+Bentonite 2
Stony Fissured Glaze ^6
Cryolite 33
Zircopax 67
+Bentonite 2
Rough Granular Glaze ^6
Cryolite 45.5
Talc 54.5
+Bentonite 2
Thank you
Al Sather
Dogberry Clay Studio
Paradise, NF A1L 1C1
| |
|
