Cone 10R Celadon Recipes

Cone 10R Celadon - Luke Lindoe

Total:101.00

Auto Unity Formula

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%.

Lindoe Dark Celadon - Lower COE

Alternate code: MGS10A

Total:102.00

Auto Unity Formula

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

Cone 10R Blue Celadon

Total:79.60

Auto Unity Formula

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="ocgKE3zG" 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

Total:101.00

Auto Unity Formula

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="u3H3kLKT" 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

Total:100.00

Auto Unity Formula

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