Redart:Ball Clay 80:20 Test
|
Code # L3724L |
Location BOX52 |
| Materials | Amt | |
|---|---|---|
| Redart | 560.000 | 80.00% |
| Gleason Ball Clay | 140.000 | 20.00% |
Total:700.00
Notes
Objective: Redart clay can be used at 100% to make a good slip casting body for low temperature. But its plasticity is much too low for modelling or throwing on the wheel. So ball clay is needed to produce a workable body. This is to determine how much ball clay is necessary to make Redart plastic, really plastic. And what will the mix’s maturity be at that level?
This is not plastic enough, more ball clay is needed.
This matures at too low a temperature (already below 4% porosity at cone 1).
L3685Z white slip on very thick did not come off at rim, but shrank away a little on the inside corner foot.
Pictures
L3724L Redart terra cotta cone 04
The L3685Z slip works well but is on too thick here.
The G1916Q glaze is also thick and has some blistering. Need to try it thinner.
L3724L fired bars
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 1 | 94.61 | 89.33 | 40.31 | 41.87 | 1.0 | 5.4% | 5.6% | 3.9% |
| 2 | 94.65 | 89.47 | 41.67 | 43.14 | -.8 | 5.3% | 5.5% | 3.5% |
| 3 | 94.72 | 90.7 | 42.39 | 44.73 | -2.0 | 5.3% | 4.2% | 5.5% |
| 4 | 94.77 | 91.59 | 42.07 | 45.42 | -3.2 | 5.2% | 3.4% | 8.0% |
| 5 | 94.75 | 92.35 | 43.01 | 47.45 | -4.0 | 5.3% | 2.5% | 10.3% |
| 6 | 94.55 | 93.96 | 43.06 | 49.07 | -6.0 | 5.5% | 0.6% | 14.0% |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Redart:Ball Clay 80:20 Test" id="64136" key="fSBvi75n" date="2026-09-08" codenum="L3724L" location="BOX52"> <recipelines> <recipeline material="Redart" amount="560.000" tolerance=""/> <recipeline material="Gleason Ball Clay" amount="140.000" tolerance=""/> </recipelines> </recipe> </recipes>
Born: 2015-01-28, Modified: 2026-09-08 16:59:14
RedArt:Ball Clay 40:60 Test
|
Code # L3118A |
Location BD1023 |
| Materials | Amt |
|---|---|
| OM #4 Ball Clay | 60.000 |
| Redart | 40.000 |
Total:100.00
Notes
The objective is to discover the ratio of Redart to ball clay that will reach near zero porosity by cone 10. With minimal bloating. And rich color with high plasticity.
Blistered by cone 8 and reaching zero porosity there. For less fired maturity the mix needs much less Redart. Plasticity is fantastic yet drying shrinkage is well below 7%.
Pictures
L3118A fired bars
Top four bars: Cone 11, 10, 9, 8
Bottom bar: Cone 10R
Out doesn’t bloat at Cone 10R but is on all the oxidation bars.
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 10 | 93.41 | BLOAT | BLOAT | BLOAT | 11.3 | 6.6% | ||
| 11 | 93.58 | BLOAT | BLOAT | BLAOT | 10.3 | 6.4% | ||
| 12 | 93.48 | 88.56 | 34.30 | 34.29 | 10.2R | 6.5% | 5.3% | 0.0% |
| 9 | 93.34 | BLOAT | BLOAT | BLOAT | 9.5 | 6.7% | ||
| 8 | 93.18 | 86.52 | 35.36 | 35.38 | 8.1 | 6.8% | 7.1% | 0.1% |
SOLU - Soluble Salts
| DRY | |
| 1 | LITE+ |
DFAC - Drying Factor
| DFAC | SOLD | |
| 1 | C110 | LITE++ |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="RedArt:Ball Clay 40:60 Test" id="67258" key="rqcNEs4j" date="2026-09-08" codenum="L3118A" location="BD1023" picturebasename=""> <recipelines> <recipeline material="OM #4 Ball Clay" amount="60.000"/> <recipeline material="Redart" amount="40.000"/> </recipelines> </recipe> </recipes>
Born: 2000-04-25, Modified: 2026-09-08 17:18:57
Redart Grogged 10R Stoneware
|
Code # L3118J |
Location BD1034 |
| Materials | Amt | Units | |
|---|---|---|---|
| RedArt | 4.000 | 50BG | 20.00% |
| SIL-CO-SIL 90 | 1.000 | 50BG | 5.00% |
| Sapphire Kaolin | 2.000 | 50BG | 10.00% |
| OM#4 Ball Clay | 8.000 | 50BG | 40.00% |
| *IONE 20/48 Grog | 5.000 | 50BG | 25.00% |
Total:453,592.00 (R)
Notes
-According to appearance of firing bars, 30% grog is too much.
-We need to round off formula
-Redart could be higher
-Will use plastic kaolin
-Will use lower carbon ball clay to prevent explosions in the kiln on thick ware.
Throwing is fabulous, it feels great.
Pictures
Untitled
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | RDIA | DSHR | FSHR | ABS | |
| 11 | 94.82 | 89.46 | 40.70 | 42.37 | 12 | 42 | 5.2% | 5.7% | 4.1% |
| 12 | 94.81 | 89.87 | 41.10 | 42.85 | 10.5R | 5.2% | 5.2% | 4.3% | |
| 10 | 94.64 | 89.30 | 40.15 | 41.93 | 10.4 | 40 | 5.4% | 5.6% | 4.4% |
| 9 | 94.87 | 89.68 | 40.75 | 42.70 | 9.2 | 38 | 5.1% | 5.5% | 4.8% |
| 8 | 94.89 | 89.72 | 41.81 | 44.27 | 8.0 | 5.1% | 5.4% | 5.9% |
SOLU - Soluble Salts
| DRY | |
| 1 | VLITE |
DFAC - Drying Factor
| DFAC | SOLD | |
| 1 | A | VLITE |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Redart Grogged 10R Stoneware" id="67371" key="LRe9H6p4" date="2026-09-08" codenum="L3118J" location="BD1034" picturebasename=""> <recipelines> <recipeline material="RedArt" amount="4.000" tolerance="" unitabbr="50BG"/> <recipeline material="SIL-CO-SIL 90" amount="1.000" tolerance="" unitabbr="50BG"/> <recipeline material="Sapphire Kaolin" amount="2.000" tolerance="" unitabbr="50BG"/> <recipeline material="OM#4 Ball Clay" amount="8.000" tolerance="" unitabbr="50BG"/> <recipeline material="IONE 20/48 Grog" amount="5.000" tolerance="" unitabbr="50BG"/> </recipelines> </recipe> </recipes>
Born: 2000-08-03, Modified: 2026-09-08 03:54:57
