Oxidation Glazes, Cone 6 -7
Albertus Magnus College

Wooster Craft Center Glazes Cone 5-6

Thanks to Robin McAlister, director for sharing these

Kiln Wash

Alumina Hydrate 35% 290
Kaolin (EPK) 25% 205
Bentonite 1% 8

David Franks "Refurbishing" Kiln Wash
1 cup kaolin
1 cup ball clay
1cup flint
1 cup fine grog
1 cup kaolin
1 cup ball clay
1 cup fine grog

Forest Green

Gerstley Borate 49   1470   2940   3920
EPK                 19     570   1140    1520
Flint                  32     960   1920    2560
Total               100   3000   6000    8000

Soda Ash         0.2        6        12        16
Chrome            2          60    120      160
Cobalt Carbonate 1       30      60       80
Bentonite           2          60     120     160

Notes: Use chromium oxide for chrome.
Glaze is a glossy deep green color.
Can use 5% zircopax for a white.

Flick Ketchup

Gerstley Borate 32
Talc 14
Flint 30
Kona F4 20
Total 100

Red Iron Oxide 15
Bentonite 2

Notes: Satin matte, rich reddish brown.

Breaking Out Red

Gerstley Borate 55
Talc       15
Flint       30
Total    100

Red Iron Oxide 22
Bentonite 2

Notes: Color variations with carved or textured surfaces.

Schefflin Yellow

Gerstley Borate 50
EPK                 15
Flint                  35

Total               100

Dark Rutile 15

Notes: Creamy yellow.

Holly's Gold

Frit 3134       20
Dolomite       20 
Spodumene   20
Ball Clay       20
Flint              20

Total:          100

Tin Oxide          3
Red Iron Oxide 2
Bentonite           2

Notes: Satin light gold color; very thin application turns rusty brown
while heavy application turns a mustard gold.

Schefflin Blue

Gerstley Borate 50
EPK                 15
Flint                  35

Total:              100

Cobalt Oxide      2
Red Iron Oxide   3

Notes: Glossy navy blue. Works well with Sarah's Folly.

Sarah's Folly

Gerstley Borate 7.5
Talc 5.4
Dolomite 3.3
Kona F4 16.6
Nepheline Syenite 32.9
Whiting 7.1
Zinc Oxide 6.6
EPK 12.5
Flint 8

Cobalt Oxide* 2
Cobalt Carbonate** 2
Bentonite 2

Notes: *Using cobalt oxide will give a deep blue-purple
**Using cobalt carbonate will give a pinkish-purple

Blue Green Matte

Ferro Frit 3195 20
Wollastonite      29
Neph Sy            4
EPK                 30
Silica                17
Total              100

Rutile 6
Copper carbonate 3
Cobalt carbonate 1.5

Faux Celadon

Kona F4 41
Flint 19
Superpax* 11
Gerstley Borate 11
Whiting 7
Dolomite 5
Zinc Oxide 2
Tenn Ball Clay 1
Bentonite 2
Total 99

Copper Carbonate 2.5

Notes: *Superpax replaces zircopax. Superpax is stronger so
use 1% less, so the recipe was altered to reflect that difference.
Originally the recipe called for 12% zircopax.

Cornwall Stone

Custer Feldspar 43.7
Cornwall Stone  21.7
Whiting              17.7
Zinc Oxide          7.5
EPK                   4.2
Titanium Dioxide 4.2
Bentonite            1.4

Total               100.4

Notes: Works well with most other glazes. Using Kona F4 makes
the glaze matte opaque white.

Other Glazes

Cone 7 Stoney White/Orange Bone Ash Glaze

G-200                          390
Dolomite                       300
EPK Kaolin                  260
Bone Ash                       50

Best over Iron bearing clay body.. Thick application is white, thinnest application is near the base. Richest brown areas have more iron spray. Mesa Community College., James Jacobs

Temoku -- cone 6-7

feldspar                        432
silica                             260
whiting                          210
kaolin                           100
red iron oxide                200
bentonite                         38

Mesa Community College., James Jacobs

Shino -- cone 6

nepheline syenite            545
spodumene                    228
ball clay                         149
gerstley borate                 49
soda ash                          29

Mesa Community College., James Jacobs


woodash                       50
ochre                            25
custer Feldspar              25

Keep glaze thin or you will be scraping shelves. Becomes transparent yellowish brown and very fluid when thickly applied. The mid way thin/thick of application is mottled like a salt fired piece and is satin matte. But I got great reds, yellows, browns, blacks on pieces where it's thinner. To make tiny rivers of ash I make the same glaze substituting Red Art for the Ochre and trail it on with a slip trail bulb. Caution: use rubber gloves with unwashed ash glazes or face the possibility of contact dermatitis.

Metallic black, cone 6 ox

spodumene                50
gerst. bor                   25
flint                            25
black iron ox             10
cobalt ox                     2
copper carb                4

This is a gorgeous black with mottled silver effects. Tends to run at cone
6. Make sure you have a good foot on the piece.

Floating blue cone 6 ox.

neph sye                       47.3
gerstely borate              27.
silica                             20.3
kaolin                             5.4
red iron ox                     2
cobatl carb                    1
rutile                              4
bentonite                        2

This glaze has been around the bend a few million times, must have been
posted here on clayart many times. Its a glossy tan background with lots
of blue
floating. It's an absolutely reliable glaze, doesn't run, pinhole etc. you
can't go wrong with it.

VC "71"

Custer Spar              40
frit 3124                     9
whiting                     16
talc                            9
epk                         10
flint                          16

Val's comments: wonderful surface. Really sensuous smooth satin matt. Kas
a kind of glow like looking at a pearl. All the colors keep this same
character, a gorgeous base glaze.

" a reliable cone 6 calcium matte glaze"

Wollastonite          34.0
Ferro Frit 3134     21.0
Kaolin                   45.0


Glossy Mossy Flossy

Cone: 6 Color: White, brown specks
Firing: Oxidation Surface: Not quite glossy

Amount Ingredient
400 Nepheline Syenite
300 Silica
100 Whiting
300 Gillespie Borate
200 Kaolin--EPK
100 Spodumene--Gwalia

1400 Total

100 Tin Oxide
11 Iron Oxide--Red

Suspends better with 1% Bentonite

Rutile Mat, cone 6, ox.

20 Whiting
56 Neph. Syenite
18 Kaolin
6 Silica
7 Rutile
9 Zinc. Ox.

Glaze test for Silky White, cone 6, ox.

48 Neph. Syenite
25 Silica
18 Whiting
8 Zinc
8 EPK Kaolin
4 Tin Oxide
=========== 111 gr.

Semi gloss, soft white glaze, even and covering. Regards from Alisa in Denmark

Cone: 5-6 Finish: Tenmoku Atmosphere: Neutral

China Clay 5.0
Nepheline Syenite 21.0
Silica 40.0
Unwashed Ash 8.0
Whiting 11.0
Red Iron Oxide 15.0

Bentonite 2.0

Since publication of the book we have continued to fine tune our firing/cooling cycle to get the results we personally like. Our current cycle (which will continue to evolve) is:


Just writing everybody that here in Brazil, Lana Wilson's red thrived in my
eletric kiln.I applied it thick and used John Hesselberth's firing profile
(www.frongpondpottery.com) but cooling rate of -125 per hour from 2190oF
down to 1500oF, then let it cool naturally. I got a wonderfull glossy wine
I will try and load pictures as soon as I can.
Thank you again for glaze gurus everywhere. I am excited to test other
Heloisa Nunes
Sao Paulo, Brazil

I call it Post's 244

It is a cone 6 glaze fired with a slow cool.
It feels great on both the dark body and the light body I have tried it
on, though the dark is richer visually.

28.7 EPK
21.5 Frit 3110
16.9 Dolomite
2.9 Talc
30 Flint

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Tenmoku is the Japanese word for a type of tea bowl first produced in China during the Song Dynasty (960-1279). It also refers to a mountain between China's Zhejiang and Anhui Provinces (Mt. Tienmu in Chinese, Mt. Tenmoku in Japanese).