Current Testing

My next round of testing intends to lock down a range of crater glazes of different colors using stains and oxides for soon application testing, as well as expanding my range of glazes to include Strontium Satin Matte Glazes, and special effect glazes such as crackles, crawls, metallics, and gloops. I’ll also be testing 2nd firing some less desirable pots with a red iron oxide wash over top. (This has been tested and is pending documentation)

CO-84

Kuan Snowflake Crackle

Cone 6-8

Nepheline Syenite	80
Whiting	5
Borax frit [used Frit 3134]	15
Bentonite	2

Apply very thickly.

Notes:

mixed at 50g water to 100g dry

Left is 8/8/8 dip, right is 12/12/12/12/12/12 over all

CO-85

Transparent Crackle

Cone 5-8

Nepheline Syenite	26
Whiting	12
Lithium Carbonate	10
Barium Carbonate	3
Calcium Borate Frit [used Gerstley Borate]	5
Silica	44
Bentonite	2

Apply very thickly.

Notes:

60g water to 100g dry, possibly a bit thin

CO-86

Runny Glaze

Cone 6-8

Soda Feldspar	45
Silica	17
Calcium Borate Frit [used Gerstley Borate]	15
Whiting	14
EPK	5
Tix Oxide	5
Bentonite	2

Apply thickly.

Notes:

mixed at 70g water to 100g dry

CO-87

Bloomfield Lichen

Cone 8

Nepheline Syenite	50
Light Magnesium Carbonate	40
Standard Borax Frit	10
Bentonite	2

Notes:

300g water to 100g dry

CO-88

Katz Crawl

Cone 8-10

Nepheline Syenite	39
Zinc Oxide	19
Silica	11
EPK	32

Notes:

120g water to 100g dry, zinc didn’t dissolve well

added 2 bentonite

CO-89

Lalone Crawl

Cone 6 Oxidation

Nepheline Syenite	70%
Ball Clay	5%
Magnesium Carbonate	25%
Bentonite	2%

Notes:

200g water to 100g dry

CO-90

Lichen

Cone 6 Oxidation

F-4 Feldspar [used generic Soda Feldspar]	30%
Kaolin	19%
Magnesium Carbonate	31%
Talc	8%
Frit 3134	6%
Zinc Oxide	6%

Notes:

added 2 bentonite

250g water to 100g dry, zinc didn’t dissolve well

CO-91

Pewter Glaze (Murfitt)

Cone 6-8

Manganese Dioxide	77
EPK	23
Bentonite	2

Test w/ thin and thick applications.

Notes:

mixed at 100g water to 100g dry

Tested at 3/3/3 and 8/8/8

CO-92

Bronze Glaze (Murfitt)

Cone 6-8

Manganese Dioxide	61
EPK	23
Copper Oxide	8
Cobalt Oxide	8
Bentonite	2

Test w/ thin and thick applications.

Notes:

mixed at 100g water to 100g dry

Tested at 3/3/3 and 8/8/8

CO-93

Strontium Matte Tests

Base CO-93-1

+2 Silica, -2% Strontium Carb CO-93-2

Tested with 3/3/3 dip and 6/6/6 dip

+5% Silica, -5% Strontium Carb CO-93-3

Tested with 3/3/3 dip and 6/6/6 dip

Without Titanium Test:

0.5% Cobalt Carb CO-93-4

1% Copper Carb CO-93-5

1% Chrome CO-93-6

6% Black Stain CO-93-7

15% Zirconium Stain CO-93-8

15% Lobster Red Stain CO-93-9

6% Rutile, 1% Copper CO-93-10

5% Titanium CO-93-10

5% Rutile CO-93-11

Crater Glaze Colorant Testing

Red and Yellow Stains

Test 8% Zirconium Stain, no Titanium Dioxide CO-94-1 “Yellow Crater”

Test 15% Zirconium Stain, no Titanium Dioxide CO-94-2 “Yellow Crater”

Test 8% Lobster Red Stain, no Titanium Dioxide CO-95-1 “Red Crater”

Test 15% Lobster Red Stain, no Titanium Dioxide CO-95-2 “Red Crater”

Retest Metallic Crater 2 CO-82-1 “Metallic Crater II”

Retest Cobalt Crater (0.5%), at 0% and 5% Titanium Dioxide CO-76-10:11 “Cobalt Crater”

no Titanium Dioxide

w/ 5% Titanium Dioxide

Retest Copper Crater (1%), at 0% and 5% Titanium Dioxide CO-75-10:11 “Copper Crater”

No Titanium Dioxide

5% Titanium Dioxide

Retest Chrome Crater (1%), at 0% and 5% Titanium Dioxide CO-77-13:14 “Green Crater” (60g water to 100g dry ON ALL)

No Titanium Dioxide

5% Titanium Dioxide

Base no TiO2 - CO-72-1 “Strontium Crater”

Retest White Crater (5% Titanium) - CO-73-1 “White Crater”

Restest Rutile Crater (5% Rutile) - CO-78-1 “Rutile Crater

Test 8% Best Black Stain, no Titanium Dioxide CO-95-2 “Black Crater”

Test 14% RIO, no TiO2 CO-74-16

RIO Application Stain

CO-96

Red Iron Oxide	50
Gerstley Borate	50

70g water to 100g dry

Gloops

Rough Gloop

CO-97

EPK	33.4
Silica	32.4
Frit 3124	30.8
Whiting	3.4
Bentonite	2

Glossy Gloop

CO-98

Silica	32.8
EPK	27.3
Frit 3134	18.6
Minspar 200 [substituted for a general soda feldspar]	13.5
Whiting	7.7
Bentonite	2

Add 40% [Added 60% instead] water by weight, blend, then dry on plaster into paste for both

No stains for now

CO-62-1

Easy E Clear

Cone 6 Oxidation

Nepheline Syenite	20%
Silica	25%
Wollastonite	20%
Kaolin	15%
Frit 3124	20%
Bentonite	2%

The best cone 6 clear that I’ve tested. Seems to be fine, thick or thin. No crazing, no dripping, no pin holing, and no dripping.

Mixed at 70g water to 100g dry

Testing 4/4:

Gloop colorants

Thick thick crackle application

Retest bronze multiple areas of kiln

Application test crater glazes

Glossy Gloop Colorant Tests

CO-98-1 (retest white for control)

CO-98-2 (5% Mason 6600 “Best Black”)

CO-98-3 (5% Mason 6026 “Lobster Red”)

CO-98-4 (5% Mason 6450 “Praseodymium”)

CO-98-5 (5% Mason 6313 “Medium Blue”)

CO-98-6 (5% Mason 6263 “Victoria”)

CO-98-7 (5% Mason 6023 “Clover Pink)

CO-98-8 Purple 8% - have in small bag, test next time

CO-98-9 (5% Mason 6129 “Gold Ambrosia”)

For next round of testing:

Colored slips

Colored Crawls [DONE]

CMW Pick-A-Part

Test known crater colorant combinations with other base recipes

CO-99-1

Colored Slip

Cone 5 Oxidation

Using Highwater Helios as base

Currently drying out

Base

+8% Mason 6313 “Medium Blue”

+8% Mason 6450 “Praseodymium”

+8% 5% Mason 6026 “Lobster Red”

Yehrim’s Cone 06 Gloop

CO-100-1

Cone 06

Whiting	17.9
Ferro Frit 3124	25.8
Nepheline Syenite	14.8
EPK	12.2
Silica	29.3

Tested as a paste at 40% applied with brush and spatula, and as a solid after drying out, but had to re-add some of the paste because it was too dry after being put on plaster pretty much immediately