Project Name
Project Codenumber
UnAssigned
Cone 10R Robin's Egg Blue
Avocado
|
Code # G1847 |
| Materials | Amt |
|---|---|
| EPK | 12.000 |
| Zinc Oxide | 5.000 |
| Gerstley Borate | 2.000 |
| Wollastonite | 15.000 |
| Whiting | 5.000 |
| Cornwall Stone | 13.000 |
| Custer Feldspar | 40.500 |
| Silica | 5.000 |
| Additions | |
|---|---|
| Ceramic Rutile | 5.000 |
| Cobalt Carbonate | 0.500 |
| Illmenite | 0.250 |
Total:103.25
Auto Unity Formula
|
Si:Al: 7.0:1 8.2 (Molar:7.7) 5.0 Cost 0.20 per kg |
Notes
*This recipe was our favourite for many years, we accepted it as "a package" rather than as a base with a rutile and cobalt addition.
It produces light blue on porcelain and progressively darker coloration as the body iron content increases.
When we were developing the G2571A dolomite matte base, and realizing the silky matting effect of high MgO levels in the calculated formula, it became evident that this glaze is not a dolomite matte! It is a calcium matte. And it became evident that this has a high calculated thermal expansion (from all the feldspar and Cornwall Stone, making it a candidate for crazing).
Thus we only use this on high quartz bodies where there is no danger of crazing.
Pictures
Cone 10R G1847 Robins Egg Blue on H550
Typecodes
RCP-Undefined
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 10R Robin&#039;s Egg Blue" keywords="Avocado" id="63618" key="xAzYRnJ6" date="2022-02-26" typecodes="RCP" codenum="G1847" picturebasename=""> <recipelines> <recipeline material="EPK" amount="12.000" tolerance=""/> <recipeline material="Zinc Oxide" amount="5.000" tolerance=""/> <recipeline material="Gerstley Borate" amount="2.000" tolerance=""/> <recipeline material="Wollastonite" amount="15.000" tolerance=""/> <recipeline material="Whiting" amount="5.000" tolerance=""/> <recipeline material="Cornwall Stone" amount="13.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="40.500" tolerance=""/> <recipeline material="Silica" amount="5.000" tolerance=""/> <recipeline material="Ceramic Rutile" amount="5.000" added="true"/> <recipeline material="Cobalt Carbonate" amount="0.500" added="true"/> <recipeline material="Illmenite" amount="0.250" added="true"/> </recipelines> </recipe> </recipes>
Born: 1980-01-01, Modified: 2022-02-26 18:25:50
Cone 10R Silky Matte Blue
|
Code # G2571C |
| Materials | Amt |
|---|---|
| Wollastonite | 21.000 |
| Custer Feldspar | 32.000 |
| EP Kaolin | 20.000 |
| Calcined Kaolin | 9.000 |
| Talc | 14.000 |
| Ferro Frit 3249 | 4.000 |
| Additions | |
|---|---|
| Titanium Dioxide | 4.000 |
| Cobalt Oxide | 0.500 |
Total:104.50
|
Si:Al: 5.5:1 6.9 (Molar:6.4) 3.8 |
Notes
*G2571A has been our go-to dolomite matte base for many years. It has very low thermal expansion, by virtue of low levels of KNaO, and fits bodies very well. And it thrives on colorant and variegator additions. So it seemed a natural to make our rutile blue using this.
This adds the titanium and cobalt to the new fritted base version of G2571A: G2571B. Titanium is being used to get better blue, rutile supplies TiO2 like titanium, but also brings along iron that muddies blue coloration.
Fabulous results. The variegation is excellent.
More cobalt would be better on white stonewares, perhaps 0.75%.
Pictures
G2571C on a buff stoneware at cone 10R
G2571C blue crystal matte on H443, H550 Cone 10R
G2571C blue crystal matte on H570, Polar Ice cone 10R
Cone 10R G2571C Blue rutile dolomite matte
Typecodes
ST-Untitled typecode
Alternate Code Number:GS10-G
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 10R Silky Matte Blue" id="185875" key="tMzWjg99" date="2022-02-26" typecodes="ST" codenum="G2571C" picturebasename=""> <recipelines> <recipeline material="Wollastonite" amount="21.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="32.000" tolerance=""/> <recipeline material="EP Kaolin" amount="20.000" tolerance=""/> <recipeline material="Calcined Kaolin" amount="9.000" tolerance=""/> <recipeline material="Talc" amount="14.000" tolerance=""/> <recipeline material="Ferro Frit 3249" amount="4.000" tolerance=""/> <recipeline material="Titanium Dioxide" amount="4.000" added="true"/> <recipeline material="Cobalt Oxide" amount="0.500" added="true"/> </recipelines> </recipe> </recipes>
Born: 2006-03-16, Modified: 2022-02-26 18:38:54
Ravenscrag Cone 10R Matte Blue
|
Code # G3909 |
| Materials | Amt | |
|---|---|---|
| Ravenscrag Slip | 35.000 | 36.08% |
| Ravenscrag Slip 1000F Roast | 52.000 | 53.61% |
| Silverline 303 Talc | 10.000 | 10.31% |
| Additions | ||
|---|---|---|
| *Mason 6300 Stain | 0.500 | 0.52% |
Total:97.50
Auto Unity Formula
|
Si:Al: 9.2:1 6.1 (Molar:5.7) 5.3 |
Notes
*This is a variation on GR10-C, our Ravenscrag Slip silky-matte base glaze.
This relies on the MgO alone to create variegation. However, some titanium could certainly be added (titanium would be better than rutile here also, to minimize iron content for better blue, the Ravenscrag already contains some iron but not enough to be an issue).
Pictures
G3909 matte blue on H443, H550 Cone 10R
G3909 Ravenscrag Cone 10R Matte Blue on porcelain
Typecodes
ST-Untitled typecode
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Ravenscrag Cone 10R Matte Blue" id="185998" key="TgdPiT1K" date="2022-09-28" typecodes="ST" codenum="G3909" picturebasename=""> <recipelines> <recipeline material="Ravenscrag Slip" amount="35.000" tolerance=""/> <recipeline material="Ravenscrag Slip 1000F Roast" amount="52.000" tolerance=""/> <recipeline material="Silverline 303 Talc" amount="10.000" tolerance=""/> <recipeline material="Mason 6300 Stain" amount="0.500" added="true"/> </recipelines> </recipe> </recipes>
Born: 1980-01-01, Modified: 2022-09-28 12:38:14
