Cone 10R Celadon Recipes

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These go back to the 1970s. We use the Alberta Slip:Ravenscrag slip version these days.


Cone 10R Celadon - Luke Lindoe

Code #

77E05B

Materials Amt
Custer Feldspar 27.000
Calcium Carbonate 20.000
EPK 20.000
Silica 33.000
Additions
Iron Oxide Red 1.000

Total:101.00

Auto Unity Formula

CaO 0.82
K2O 0.12
Na2O 0.05
(KNaO) 0.17
Al2O3 0.48
SiO2 4.11
Fe2O3 0.03

Ratios

Si:Al: 8.5:1
R2O:RO: 0.2:0.8

Expansion

6.7 (Molar:6.4)

LOI

11.9

Cost

0.19 per kg

Notes

*This recipe was used, and possibly developed, by Luke Lindoe.

He used as much from 1-5% iron for light to dark green colors.

This did craze on some bodies, one simple change to improve it would be to use 325 mesh silica (increase of 200 mesh).

Pictures

Lindoe Cone 10R glaze slip overlay tests

Bodies are H435 and H440
Base glaze: Likely S2 and Celadon
Markings: CR., 25-I, Cry. I.
8-1-40, R.O.M., Mrtl Black

Lindoe Cone 10R glaze tests

#1: Cr I/S2 - Crystal iron red with S2 overlay on H443
#2: Cry Matt - Crystal iron red on H441G
#3: Cr I/S2 - Crystal iron red with S2 overlay on H435
#4: Cr I/GrCel - Crystal iron red with green celadon overlay on H443
#5: BT. 3. Chr - on H440G
#5: 74-61-C - Red Mustard on H440G

Lindoe celadon (light and dark versions)

The dark had about 5% iron, the light about 3%.

Typecodes

RCP-Undefined

Alternate Code Number:G 140

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 10R Celadon - Luke Lindoe" id="71931" key="Psti9xv2" date="2023-03-18" typecodes="RCP" codenum="77E05B" picturebasename=""> <recipelines> <recipeline material="Custer Feldspar" amount="27.000" tolerance=""/> <recipeline material="Calcium Carbonate" amount="20.000" tolerance=""/> <recipeline material="EPK" amount="20.000" tolerance=""/> <recipeline material="Silica" amount="33.000" tolerance=""/> <recipeline material="Iron Oxide Red" amount="1.000" added="true"/> </recipelines> </recipe> </recipes>

Born: 1990-02-13, Modified: 2023-03-18 13:02:16

Lindoe Dark Celadon - Lower COE

Alternate code: MGS10A

Code #

77E06B

Materials Amt
Custer Feldspar 25.500
Calcium Carbonate 14.000
EPK 19.000
Silica 31.000
Dolomite 8.500
Additions
IRON OXIDE 4.000

Total:102.00

Auto Unity Formula

CaO 0.68
MgO 0.17
K2O 0.10
Na2O 0.05
(KNaO) 0.15
Al2O3 0.41
SiO2 3.46
Fe2O3 0.09

Ratios

Si:Al: 8.5:1
R2O:RO: 0.1:0.9

Expansion

6.8 (Molar:6.4)

LOI

13.6

Cost

5.21 per kg

Notes

*To reduce the thermal expansion and eliminate some of the crazing we were getting we adjusted the original 77E05B recipe by introducing MgO (from Dolomite) at the expense of CaO.

This fires a fairly dark green and fits on H431, H443, H440, H442, H440G, etc. To make a lighter green, reduce the iron. For transparent, take the iron out.

This recipe could use a little more SiO2 to give it better gloss. 1947U can also be used as a celadon by adding iron oxide, that is another way to get high gloss.

Pictures

G1947U with 3% iron oxide.

A test to see how well it will produce a celadon.

Cone 10R jiggered celadon plate

77E06B glaze

Typecodes

ST-Untitled typecode

Alternate Code Number:GS10-A

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Lindoe Dark Celadon - Lower COE" keywords="Alternate code: MGS10A" id="63496" key="HPzcpcdX" date="2023-02-24" typecodes="ST" codenum="77E06B" picturebasename=""> <recipelines> <recipeline material="Custer Feldspar" amount="25.500" tolerance=""/> <recipeline material="Calcium Carbonate" amount="14.000" tolerance=""/> <recipeline material="EPK" amount="19.000" tolerance=""/> <recipeline material="Silica" amount="31.000" tolerance=""/> <recipeline material="Dolomite" amount="8.500" tolerance=""/> <recipeline material="IRON OXIDE" amount="4.000" added="true"/> </recipelines> </recipe> </recipes>

Born: 1990-02-13, Modified: 2023-02-24 15:31:05

Cone 10R Blue Celadon

Code #

G2584

Materials Amt
Nepheline Syenite 35.000 46.24%
Calcium Carbonate 5.000 6.61%
EPK 4.000 5.28%
Silica 325 mesh (Silica) 23.400 30.91%
Dolomite 8.300 10.96%
Additions
Iron Oxide Red 3.900 5.15%

Total:79.60

Auto Unity Formula

CaO 0.46
MgO 0.21
K2O 0.08
Na2O 0.25
(KNaO) 0.33
Al2O3 0.43
SiO2 3.54
Fe2O3 0.11

Ratios

Si:Al: 8.2:1
R2O:RO: 0.3:0.7

Expansion

7.5 (Molar:7.1)

LOI

9.5

Cost

0.05 per kg

Notes

*This is a variation on 77E06B STANDARD CELADON introducing soda at the expense of CaO to turn the iron blue.

The very low kaolin is problematic in achieving a good slurry. This could likely be reformulated by sourcing the KNaO from frit 3110, that has almost no Al2O3 and would enable increasing the kaolin.

The melting is much better. However, crazing can be an issue since the thermal expansion is higher (from the increased Na2O).

The 325 mesh silica was not used in the original but is recommended now, that might help reduce the chances of crazing. Another possible was to reduce expansion would increasing the silica a little.

Pictures

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 10R Blue Celadon" id="63999" key="FYXjyuG5" date="2023-02-24" codenum="G2584" picturebasename=""> <recipelines> <recipeline material="Nepheline Syenite" amount="35.000" tolerance=""/> <recipeline material="Calcium Carbonate" amount="5.000" tolerance=""/> <recipeline material="EPK" amount="4.000" tolerance=""/> <recipeline material="Silica 325 mesh" lookup="Silica" amount="23.400" tolerance=""/> <recipeline material="Dolomite" amount="8.300" tolerance=""/> <recipeline material="Iron Oxide Red" amount="3.900" added="true"/> </recipelines> </recipe> </recipes>

Born: 1995-02-24, Modified: 2023-02-24 15:50:55

LEACH'S CELADON CONE 10R

Code #

G1002

Materials Amt
Cornwall Stone 25.000
EPK 25.000
Calcium Carbonate 25.000
Silica 25.000
Additions
Iron Oxide Red 1.000

Total:101.00

Auto Unity Formula

CaO 0.90
K2O 0.04
Na2O 0.05
(KNaO) 0.09
Al2O3 0.46
SiO2 3.19
Fe2O3 0.03

Ratios

Si:Al: 6.9:1
R2O:RO: 0.1:0.9

Expansion

6.7 (Molar:6.6)

LOI

14.7

Cost

0.24 per kg

Notes

*This recipe is used commonly and was likely popular because of its 25x4 simplicity. It has been included here for comparison.

This has a high CaO and lower SiO2 than any of the others. Its thermal expansion is high enough that crazing could occur. Use of M325 mesh silica would be beneficial to prevent that.

Pictures

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="LEACH&amp;#039;S CELADON CONE 10R" id="63730" key="KG3Rn6T1" date="2023-02-24" codenum="G1002" picturebasename=""> <recipelines> <recipeline material="Cornwall Stone" amount="25.000" tolerance=""/> <recipeline material="EPK" amount="25.000" tolerance=""/> <recipeline material="Calcium Carbonate" amount="25.000" tolerance=""/> <recipeline material="Silica" amount="25.000" tolerance=""/> <recipeline material="Iron Oxide Red" amount="1.000" added="true"/> </recipelines> </recipe> </recipes>

Born: 1995-04-06, Modified: 2023-02-24 15:48:47

Ravenscrag Alberta Slip Celadon

Code #

G2881B

Materials Amt
Ravenscrag Slip 1000F Roast 47.500
Alberta Slip 47.500
Ferro Frit 3134 5.000

Total:100.00

Auto Unity Formula

CaO 0.55
MgO 0.23
K2O 0.12
Na2O 0.10
(KNaO) 0.22
TiO2 0.01
B2O3 0.06
Al2O3 0.46
SiO2 3.40
Fe2O3 0.06

Ratios

Si:Al: 7.3:1
SiB:Al: 7.4:1
R2O:RO: 0.2:0.8

Expansion

6.9 (Molar:6.5)

LOI

5.8

Notes

*The previous version had 10% frit but it had too much melt fluidity. If this is not fluid enough increase the frit slightly.

Either of the two materials could be used in the roast form. If this is not done the glaze will shrink too much during drying and crack (and then crawl during firing).

As with other celadons, iron could be added to darken the color.

Pictures

G2881B Raven Alberta Celadon

This version has the 5% frit added. 10% is too much, this might not be quite enough.

G2881A Ravenscrag Celadon

With 10% frit 3134 added to a 50:50 mix of Ravenscrag and Alberta Slip.

G2881B celadon outside, Ravenscrag slip inside

Fired at cone 10R
On H550

Alternate Code Number:GR10-E

XML (to paste into Insight)

<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Ravenscrag Alberta Slip Celadon" id="56877" key="9QCxFc54" date="2023-10-31" codenum="G2881B" picturebasename=""> <recipelines> <recipeline material="Ravenscrag Slip 1000F Roast" amount="47.500" tolerance=""/> <recipeline material="Alberta Slip" amount="47.500" tolerance=""/> <recipeline material="Ferro Frit 3134" amount="5.000" tolerance=""/> </recipelines> </recipe> </recipes>

Born: 2010-06-11, Modified: 2023-10-31 23:38:35