Project Name
Iron Stoneware for functional
Project Codenumber
UnAssigned
Notes
This project seeks to build a dark rich red burning clay body on the red St. Rose Red fireclay. One that can be used for functional ware and has the capability to produce a metallic surface.
H440C (concentrate) #2 + Feldspar
|
Code # L4168G |
| Materials | Amt | |
|---|---|---|
| ST ROSE RED (Saint Rose Red) | 70.000 | 63.64% |
| *A1 Mix (PR#3 A1 BALL CLAY) | 30.000 | 27.27% |
| Custer Feldspar | 10.000 | 9.09% |
| Additions | ||
|---|---|---|
| Barium Carbonate | 0.350 | 0.32% |
Total:110.35
Notes
Unlike L4168F glazed pieces did not crack out of the kiln. They are actually very very strong, it took dozens of hammer taps to very a piece vertically for photographing the cross section.
This could be a viable functional body with a little more feldspar. But it has no plasticity.
Pictures
L4168G H440C fired bars
L4168G mugs
L4168G pieces did not split or crack like all the others
L4168G mug cross section
Untitled
H440 vs L4168G with Ravenscrag glaze
Typecodes
MAS-Master Ticket
Alternate Code Number:FIRERED
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 10 | 94.5 | 90.5 | 42.15 | 44.99 | 10.0 | 5.5% | 4.2% | 6.7% |
| 12 | 94.5 | 91.19 | 41.55 | 43.92 | 10.0R | 5.5% | 3.5% | 5.7% |
| 9 | 94.3 | 90.6 | 43.08 | 46.49 | 9.0 | 5.7% | 3.9% | 7.9% |
| 8 | 94.2 | 90.9 | 44.3 | 48.28 | 8.0 | 5.8% | 3.5% | 9.0% |
| 7 | 94.3 | 91.3 | 42.39 | 46.44 | 7.0 | 5.7% | 3.2% | 9.6% |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="H440C (concentrate) #2 + Feldspar" id="224307" key="H5ft5G7J" date="2023-04-20" typecodes="MAS" codenum="L4168G" picturebasename=""> <recipelines> <recipeline material="ST ROSE RED" lookup="Saint Rose Red" amount="70.000" tolerance=""/> <recipeline material="A1 Mix" lookup="PR#3 A1 BALL CLAY" amount="30.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="10.000" tolerance=""/> <recipeline material="Barium Carbonate" amount="0.350" added="true"/> </recipelines> </recipe> </recipes>
Born: 1995-10-13, Modified: 2023-04-20 15:51:29
H440C (concentrate) #3
|
Code # L4168G3 |
| Materials | Amt |
|---|---|
| Saint Rose Red | 60.000 |
| *A2 Balll Clay | 30.000 |
| Custer Feldspar | 10.000 |
| Additions | |
|---|---|
| Barium Carbonate | 0.350 |
Total:100.35
Notes
A little smoother, good to throw. Feels like H440.
Pictures
L4168G2 to G5 Cone 10R bars
These demonstrate varying proportions of St. Rose and A2 along with adjustments to the percentage of feldspar to study the impact on surface character and color. The G5 achieved the surface we want (but it used Custer Feldspar which is no longer available and was still a little short on plasticity). The G9 mix resolves both issues.
Typecodes
MAS-Master Ticket
Alternate Code Number:FIRERED
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 9 | 94.52 | 90.4 | 43.98 | 46.45 | 10.0 | 5.5% | 4.4% | 5.6% |
| 12 | 94.13 | 91.16 | 43.43 | 45.27 | 10R | 5.9% | 3.2% | 4.2% |
| 10 | 94.34 | 5.7% |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="H440C (concentrate) #3" id="227852" key="qL65tcZy" date="2023-04-20" typecodes="MAS" codenum="L4168G3" picturebasename=""> <recipelines> <recipeline material="Saint Rose Red" amount="60.000" tolerance=""/> <recipeline material="A2 Balll Clay" amount="30.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="10.000" tolerance=""/> <recipeline material="Barium Carbonate" amount="0.350" added="true"/> </recipelines> </recipe> </recipes>
Born: 1995-10-13, Modified: 2023-04-20 15:51:40
H440C (concentrate) #4
|
Code # L4168G4 |
| Materials | Amt |
|---|---|
| Saint Rose Red | 55.000 |
| A2 Ball Clay | 30.000 |
| Custer Feldspar | 15.000 |
| Additions | |
|---|---|
| Barium Carbonate | 0.350 |
Total:100.35
Notes
This was softer, but still pretty good to throw, felt about the same as G3.
Pictures
L4168G2 to G5 Cone 10R bars
These demonstrate varying proportions of St. Rose and A2 along with adjustments to the percentage of feldspar to study the impact on surface character and color. The G5 achieved the surface we want (but it used Custer Feldspar which is no longer available and was still a little short on plasticity). The G9 mix resolves both issues.
Typecodes
MAS-Master Ticket
Alternate Code Number:FIRERED
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 9 | 93.57 | 88.24 | 42.33 | 43.8 | 10.0 | 6.4% | 5.7% | 3.5% |
| 12 | 93.48 | 88.38 | 42.94 | 43.56 | 10R | 6.5% | 5.5% | 1.4% |
| 10 | 93.34 | 6.7% |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="H440C (concentrate) #4" id="228865" key="aC1BR5QC" date="2023-04-20" typecodes="MAS" codenum="L4168G4" picturebasename=""> <recipelines> <recipeline material="Saint Rose Red" amount="55.000" tolerance=""/> <recipeline material="A2 Ball Clay" amount="30.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="15.000" tolerance=""/> <recipeline material="Barium Carbonate" amount="0.350" added="true"/> </recipelines> </recipe> </recipes>
Born: 1995-10-13, Modified: 2023-04-20 15:52:58
H440C (concentrate) #5
|
Code # L4168G5 |
| Materials | Amt |
|---|---|
| Saint Rose Red | 50.000 |
| A2 Ball Clay | 40.000 |
| Custer Feldspar | 10.000 |
| Additions | |
|---|---|
| Barium Carbonate | 0.350 |
Total:100.35
Notes
This is an effort to produce the reddest possible speckling reduction firing body that is still dense enough to be useful in making functional ware. The key to this is the high percentage of St. Rose Red (for color), the A2 for speckle and plasticity and the feldspar (which develops enough vitrification to neutralize the reduced iron and prevent black coring).
A little soft when throwing. But this is the best so far, pretty plastic. Not smooth but has tolerable tooth.
Pictures
G4168G5 mugs with Ravenscrag, G2571 glazes
These mugs were fired at cone 10R. The body is L4168G5 (50% Saint Rose Red, 40% A2, 10% Custer feldspar). The heavy iron specking is being sourced by both of these very unique clays. The left glaze is GR10-CW Ravenscrag Talc matte with added Zircopax. The right one has that same glaze on the inside and G2571A bamboo matte on the outside.
The G9 recipe ended up adding more A2 (thus less St Rose) and using Nepheline instead of Custer.
L4168G2 to G5 Cone 10R bars
These demonstrate varying proportions of St. Rose and A2 along with adjustments to the percentage of feldspar to study the impact on surface character and color. The G5 achieved the surface we want (but it used Custer Feldspar which is no longer available and was still a little short on plasticity). The G9 mix resolves both issues.
L4168G5 cone 9 fired bars
Typecodes
MAS-Master Ticket
Alternate Code Number:FIRERED
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 9 | 92.92 | 88.26 | 41.91 | 44.19 | 10.0 | 7.1% | 5.0% | 5.4% |
| 12 | 92.86 | 88.99 | 41.79 | 43.72 | 10R | 7.1% | 4.2% | 4.6% |
| 8 | 93.21 | 88.97 | 40.95 | 43.98 | 8.0 | 6.8% | 4.5% | 7.4% |
| 10 | 92.59 | 7.4% |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="H440C (concentrate) #5" id="230587" key="zRmQyg6t" date="2023-04-20" typecodes="MAS" codenum="L4168G5" picturebasename=""> <recipelines> <recipeline material="Saint Rose Red" amount="50.000" tolerance=""/> <recipeline material="A2 Ball Clay" amount="40.000" tolerance=""/> <recipeline material="Custer Feldspar" amount="10.000" tolerance=""/> <recipeline material="Barium Carbonate" amount="0.350" added="true"/> </recipelines> </recipe> </recipes>
Born: 1995-10-13, Modified: 2023-04-20 15:52:09
