Lili Krakowski on thu 19 apr 07
I am sorry you did not find the info in the Archives., Here with some
spelling corrections is a copy of that message.
I do need to point out however that these glazes are Twice-Fired, not
twice-Forced!!
Copy of post 3/2001
Some nice person the other day asked for some wood ash containing glazes
at c. 6 electric fired.
I have fired c.6 in my woodburning kiln, and that has worked.
However Nora Braden said that wood ash effects require a woodburning kiln.
Even other fuel burners are not the same deal.
As to ash: I am told treated lumber contains all kinds of evil stuff
from preservatives. I would not even use ashes from a burned out
building--who knows what lead lurks. I do use ash from my woodburning
stoves, the neighbors' woodburning furnaces, and ash gathered in orchards
when they burn the dead branches etc. When using ash from stoves; do not
use if too much paper (like newspaper "logs" have gone that'a'way as they
contain a lot of clay.
Lili's RAB variation.
Red Art Clay (hereinafter RA 80
Washed Wood Ash (hereinafter WWA) 20
Ferro Frit (FF) 3134 0r 3124 5
Red Iron Oxide 5
Rutile 5
Cobalt Carb 1
Also interesting with Barnard/Blackbird instead of RA. Probably works
with any surface clay (TEST!!!!!)
Rich cooking-chocolate brown to black, speckles where thick
Adapted from Cooper
Potash Spar 25
RA 12
Whiting 18
Ash 20
Flint 25
I tested, never used. Stony roughish glaze. I'd have to work on it with
added flux to suit my needs.
From my Twice-Fired Glazes Pottery Making Illustrated ran sometime last
year.[this would be 2000]
These glazes all are fired to c. 6 first. Then they may or may not be
refired to c.04 for color changes. Strongly affected by clay body
underneath. Use slips and check out.
These started out as ALbany glazes from Hobart Cowles's twice fired
glazes.
To replicate ALBANY: Mix
RA 580
Dolomite 80
Whiting 25
This if for glazes WITH extra iron (RA has more than Albany)
For those without extra Iron
RA 80
BallClay 20
Dolomite 10
Wollastonite 10
Hannah's APPLE BUTTER
RA mix 75
Washed Ash 14
Talc14
At c.6 satiny butter-scotch. More fluid over slips
At c.o4 rich satiny apple butter color.
for those who don't know apple butter--think very caramelized apple
sauce,golden ale, that idea.
LITTLE ALEX
RA Mix 60
Neph Sy 20
Dolomite 10
Frit 3185 20
Fe203 5
At c.6 rich semi-trans shiny brown
at c.04 almost metallic, satiny, rich brown, with hints of dark rich red.]
I think--hello there in Albania--that surface clay fritted with any form
of washing soda, bicarbonate, borax would work. You got to test. Maybe
someone can inform you about cullet. As I understand it cullet is ground
up glass used--reused, recycled--in bottle plants. NO idea what melting
point is. But in my travels have found craftsmen are helpful to other
craftsmen.
AND I THINK ANY SURFACE CLAY SCREENED ETC WOULD WORK. BUT AS OTHERS HAVE
SAID WHO KNOWS WHAT EVIL HAS GOTTEN INTO A TRUE SURFACE CLAY FROM A
POND...
And I certainly would test any glaze with a good feldspar contents and
replace feldspar with ash till I reach a nice glaze.
Lili Krakowski
Be of good courage
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