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cone 6 reduction glazes

updated wed 21 mar 12 on sun 24 mar 96

Here are a couple of cone 6 reduction glazes to try:

Vivikas cone 2-6 reduction (Can go higher)

8.27 Zinc Oxide
17.54 Colemanite
6.71 Barium Carbonate
6.44 Talc
38.56 G200 Feldspar
22.48 Flint

Add: 1% Bentonite
Color Variations:
A: Add 2% Copper Oxide
B: For blue Add 1% Cobalt Oxide
C: Nickel Oxide 1%
D: For blue-grey add Nickel Oxide 1%, Cobalt Oxide 1%

Glaze number 974 cone 6-8 reduction Kawai Celadon

61.3 Potash Feldspar
7.5 Limestone
4.9 China Clay
24.8 Quartz
1.5 Black Iron Oxide

Note: Add 2% Barium Carbonate for bluish celadon. Also can substitute red
iron oxide for the black to get a yellow green celadon.

#288 cone 6-8 Reduction Orange Brown Speckled Tan (Lots of surface texture)

53 Custer Feldspar
22 Whiting
16 Barium Carbonate

Add: Rutile 2-3% on sun 24 mar 96

Thanks for the cone 6 reduction glazes. Here a the glazes we've found work
out OK, and are currently studio shop glazes. We have noticed that a
slightly heavier reduction is needed for cone 6 than in cone 9/10.

Kendall Matt Cone 6 reduction Matt (Tan/Orange)

Neph Sy............63.5
Lith Carb............. 2.8
Whiting............. 8.4
Talc................ 11.2
Magnesium Carb..3.7
Gerstley Borate...6.5
Bentonite........... 3.7

For Orange Add:


Temmoku Cone 6 reduction Reddish Brown/black gloss

Custer Feldspar.....35
EPK..................... 8
Flint..................... 21

Bentonite.............. 3
Red Iron Oxide...... 16

Blue Matt (Jury still out on this one, so far so good) Cone 6 reduction

Neph Sy..............55
Dolomite............. 11.5
Strontium Carb... 11.5
OM4 Ball Clay.... 7
Flint.................. 3
Gerstley Borate... 9

Cobalt Carb...........1

I am getting encouraged from the responses. If you have any more cone 6
reduction glazes out there, I'd love to have them to try.


Mary Ann Diggory on tue 26 aug 03

I haven't done any cone 6 reduction yet, but I have done cone 10 reduction using cone 6 glazes. Some were good and some weren't. I do mix cone 10 glazes with cone 6 glazes. You just have to test, test, and more tests.

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Jeff Tsai on tue 13 jan 04

Hi everyone,

Long time without so much as looking at the list...hello again...been busy.

Anyway, I was wondering if those of you out there might have some good cone 6
reduction glaze recipes stored away to give out. The high school I work at is
going to change over from cone 5 OXidation to cone 6 reduction over the
summer and change to all hand-made glazes. I've searched the archives and found
quite a number of glazes from 1996 through 2000, but who knows what changes and
revisions and new finds may now be available...I have Ferguson's Yellow written
down, thanks.

I'm not looking to get the list inundated with recipes...unless y'all want
that. I'm looking specifically for glazes that are fairly stable (as in don't
run all over the place) and mostly food safe. It would be nice if the glazes
were also fairly cost effective (low income school and all). Interesting hard to
find colors would be nice...I've already got about five iron red recipes,
several blacks, and a stack of browns to test.

A nice grey
A nice purple
A nice orange
A bright yellow would be nice...but I know it would be hard.
A reliable copper red
anything that might have a visually mottled look would be nice to test; I
have enough base glazes and simple recipes for matt, solid-colored glazes

I realize some of these colors are nearly impossible to come by without the
addition of expensive stains (which we cannot afford), but just throw it out to
me if you're willing and we'd greatly appreciate it.

Thanks, your all always a big source of help.

PS- if you do post recipes, would you mind also sending an extra copy to my

sometimes I miss posts that I really want to read because of the large # of
posts to the list nowadays.


Jeff Tsai

RubiaM&M on wed 14 jan 04

Hi Jeff I make ceramic in Brazil and have adds prescriptions I have will
be reduction in cone 6, test and see if he likes adds.

ash transparent
potash to feldspar 55%
wood ash or cement 20%
withing 8% ball clay 7%
zinc oxide 10%
rutile 5%

potash to feldspar 31
withing 14 silica 28
ball clay 9
wood ash 15
zinc oxice 3
red iron oxide 11

night blue
potash to feldspar 44
withing 10 silica 15
ball clay 10
zinc oxice 7
titanium dioxide 7
ultrox 7
red iron oxide 2
cobalt oxide 1,5

best regards rubia moraes

marcia selsor on wed 14 jan 04

Hi Jeff,
I posted the shop ^6 reduction glazes we used for 20+ years when I taught in
Montana State University in Billings. Many of those are going to be included
in Michael Bailey's new book on ^6 reduction glazes.
You may already have our black, iron reds, etc. So if you go back
to the archives, I also posted a good base glaze I called Marci's matt. It was
also listed in the Fire Place article in PMI Sept./Oct 2003.
I listed a variety of colorants with it in that article. You can also see the
results there as well.
Best wishes, Marcia

Snail Scott on thu 24 jun 10

On Jun 24, 2010, at 9:11 AM, ELAINE CARROLL wrote:
> Are there any glazes specifically for Cone 6 reduction? Elaine

Lots and lots.

First, though, I should ask why you want reduction
glazes? Because reduction is what your kiln does
best (or all that your shared studio offers) and you
want glazes that will look good? Or because you
seek certain effects that can't be achieved in

Many glazes, of course, will work for both reduction
and oxidation, but some will look much the same
either way and some will differ. A 'specifically for
reduction' glaze is often just a glaze that looks
different if reduced than if not, being used in

If it's reduction-specific effects you want, look for
glazes that get specific changes from reduction:
copper reds, shinos, temmokus, iron glazes, et al.
If you just want glazes that look nice in a reduction
firing, you can try almost any temperature-
appropriate recipe. Many of them will work well
in any atmosphere, though the result may differ.


ELAINE CARROLL on thu 24 jun 10

Are there any glazes specifically for Cone 6 reduction? Elaine

Edouard Bastarache on thu 24 jun 10


Edouard Bastarache


----- Original Message -----
Sent: Thursday, June 24, 2010 10:11 AM
Subject: Cone 6 reduction glazes

> Are there any glazes specifically for Cone 6 reduction? Elaine

Deborah Thuman on fri 25 jun 10

Are there specific glazes? Yes and no. I've tried commercial glazes
that have no change that I can see in reduction and commercial glazes
that change dramatically in reduction. I'm finding things with blue
and green in them can become magical in reduction. The raspberry glaze
recipe in MC6 Glazes turns a magnificent melange of pinks and blues.
I've found the Caribbean Green (or Blue - I forget and my book isn't
handy) from MC6 Glazes turns a crappy black in reduction. I've found
the Coyote Clay Blue Oasis glaze is miserable in oxidation and
delightful in reduction.

There's a glaze called Panama Red (it's somewhere on the internet)
that is mint green in oxidation and deep red in reduction. And if you
do it just right, it's mint green on the flat parts, and deep red in
the incised parts. It's a great glaze for textured pieces.

Logan's translucent aqua (from Logan) may or may not turn maroon in
part or in total in reduction. Depends on where it is in the kiln and
how much of the stuff there is.

Reduction is great fun and I'm having wonderful fun experimenting.
Test like crazy. For me and the kiln I'm using, I fire to roughly ^5.5
(5 down and 6 starting to move). Then, I shut off the middle burners
and turn down the outer burners and leave things alone for 30 minutes.
An hour is too long. I fire reduction from ^08 through ^1. Then it's
oxidation up to ^5.5 or so. The hold is also done in oxidation. Then
everything is shut off, damper closed, peeps plugged, and let things
sit until cool.

Deb Thuman

William & Susan Schran User on tue 20 mar 12

Mel wrote in a message on kilns:

"diana pancioli has many modified recipes for cone 6 reduction.
bill burgert is firing cone 6 reduction in his small back yard kiln
and because of denver altitude, and low gas pressure he found
that cone 6, light reduction is perfect for him."

I would like to invite folks interested in cone 6 reduction firing to visit
Diana's website for a list of glazes to test. Here's her Glaze Forward page=

I would also invite you to visit my web site for a page of cone 6 reduction
At the bottom of the page, I have just added the latest named Ron's Fall
Yellow. Ron Roy was of great help in suggesting base formulas to get a nice
smooth mat. This was an attempt to recreate a yellow glaze we were using at
cone 10 and after months of testing, we finally got it to work.
Also, Dick White reports that similar effect can be had with this glaze in
an oxidizing firing.

William "Bill" Schran