G2934:G2926B Oatmeal Cone 6 #2
|
Code # G3933A |
| Materials | Amt |
|---|---|
| G2934 Matte Glaze (G2934) | 80.000 |
| G2926B Glossy Glaze (G2926B) | 20.000 |
| Additions | |
|---|---|
| Red Iron Oxide | 1.500 |
| Tin Oxide | 5.000 |
| Rutile | 1.500 |
Total:108.00
Auto Unity Formula
|
Si:Al: 6.6:1 5.9 (Molar:5.9) 11.9 Cost 9.52 per kg |
Notes
*This is an adjustment to G3933 for a little more matteness and a little more variegation (this has more iron, more G2934, more rutile.
This also works with Alberta Slip.
We tried adding gum: 900 water, 100 gumsol with 1200g powder. That dried much too slowly and did not drain well.
On subsequent mixes for each 1000 powder we started with 930 water (increasing as needed). This produced a creamy slurry that worked very well.
Pictures
G3933 vs G3933A at cone 6
Using the C6DHSC schedule.
G3933A cone 5
Using the C5DHSC firing schedule.
G3933A cone 5 on L4484D black porcelain
Using the C5DHSC firing schedule.
G3933A G2934:G2926B Oatmeal on dark, light body
Standard cone 6 C6DHSC firing schedule on M390, M340.
G3933A On M340, Coffee clay
Drop and soak, 250c/hr down to 1400C.
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G2934:G2926B Oatmeal Cone 6 #2" id="211015" key="M5aBGqWT" date="2023-10-31" codenum="G3933A"> <recipelines> <recipeline material="G2934 Matte Glaze" lookup="G2934" amount="80.000" tolerance=""/> <recipeline material="G2926B Glossy Glaze" lookup="G2926B" amount="20.000" tolerance=""/> <recipeline material="Red Iron Oxide" amount="1.500" added="true"/> <recipeline material="Tin Oxide" amount="5.000" added="true"/> <recipeline material="Rutile" amount="1.500" added="true"/> </recipelines> </recipe> </recipes>
Born: 2021-10-27, Modified: 2023-10-31 21:15:21
G3933 Oatmeal Ravenscrag #2
|
Code # G3933E |
| P | Materials | Amt | |
|---|---|---|---|
| Ravenscrag Slip | 26.500 | 26.47% | |
| Ravenscrag Slip 1000F Roast | 22.000 | 21.98% | |
| Calcined Kaolin | 14.500 | 14.49% | |
| Ferro Frit 3249 | 11.500 | 11.49% | |
| Dolomite | 9.700 | 9.69% | |
| Ferro Frit 3110 | 7.100 | 7.09% | |
| Silica 325 (Silica) | 8.800 | 8.79% |
| P | Additions | ||
|---|---|---|---|
| * | Tin Oxide | 5.000 | 5.00% |
| * | Rutile | 1.500 | 1.50% |
| * | Red Iron Oxide | 1.500 | 1.50% |
Total:108.10
Auto Unity Formula
|
Si:Al: 6.6:1 6.1 (Molar:5.8) 7.6 |
Notes
*This is the product of an effort to achieve the warm and rich color of G3933 without the tendency to crawl. To do that we have used Ravenscrag Slip as the base and sourced MgO from dolomite and Ferro Frit frit 3249 (earlier tests sourcing MgO from talc were unsuccessful, off-gassing from the talc was puffing up the glaze with micro-bubbles).
Requires about 45:55 water:powder to make a good slurry. An advantage of this recipe is the ability to adjust the ratio of raw:calcine Ravenscrag Slip to tune the properties of the slurry (drying hardness, suspension).
Pictures
g3933D vs G3933 vs G3933E
G3933E is glossy but is not puffing up like G3933D does. The original G3933 (centre) is the target surface.
G3933E on porcelain, M340, M390, Coffee Clay
Too glossy (this was not a slow cool firing). However there is no crawling.
G3933 vs G3933E mugs
G3933D has no crawling (while the G3933 has a lot). This was not a slow cool firing.
g3933D vs G3933E mugs
G3933D is puffing up (because of the talc). G3933E has no crawling but is a little too glossy. This was drop-and-hold but not slow cool firing.
G3933 vs G3933E slow and fast cooled
The G3933E has richer color than the original G3933. And it is flexible to be glossy or matte depending on cooling.
G3933E Vs G3933
Slow cool firing. The G3933E is giving a better surface.
Typecodes
C6-Cone 6
Alternate Code Number:MG6CDM
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G3933 Oatmeal Ravenscrag #2" id="243984" key="Na6umSz7" date="2023-10-12" typecodes="C6" codenum="G3933E" picturebasename=""> <recipelines> <recipeline material="Ravenscrag Slip" amount="26.500" tolerance=""/> <recipeline material="Ravenscrag Slip 1000F Roast" amount="22.000" tolerance=""/> <recipeline material="Calcined Kaolin" amount="14.500" tolerance=""/> <recipeline material="Ferro Frit 3249" amount="11.500" tolerance=""/> <recipeline material="Dolomite" amount="9.700" tolerance=""/> <recipeline material="Ferro Frit 3110" amount="7.100" tolerance=""/> <recipeline material="Silica 325" lookup="Silica" amount="8.800" tolerance=""/> <recipeline material="Tin Oxide" amount="5.000" added="true"/> <recipeline material="Rutile" amount="1.500" added="true"/> <recipeline material="Red Iron Oxide" amount="1.500" added="true"/> </recipelines> </recipe> </recipes>
Born: 2014-03-21, Modified: 2023-10-12 14:46:05
G3933 Oatmeal Alberta Slip + Li
|
Code # G3933G1 |
| Materials | Amt | |
|---|---|---|
| Alberta Slip | 38.102 | 38.02% |
| Alberta Slip 1000F Roasted | 13.000 | 12.97% |
| Calcined Kaolin | 10.309 | 10.29% |
| Ferro Frit 3249 | 11.403 | 11.38% |
| Silica 325 (Silica) | 16.272 | 16.24% |
| Calcium Carbonate | 5.829 | 5.82% |
| Dolomite | 5.289 | 5.28% |
| Additions | ||
|---|---|---|
| Tin Oxide | 5.000 | 4.99% |
| Rutile | 1.500 | 1.50% |
Total:106.70
Auto Unity Formula
|
Si:Al: 6.5:1 6.1 (Molar:5.9) 9.0 |
Notes
*This was done to find a way to mix G3933 Oatmeal using Alberta Slip. But it morphed into an Albany Brown recipe.
We had 1740g slurry and did a water content test to determine 824g powder. Added 16g Li2O3 (2%) for A, 16 more for B, 16 more for C.
Pictures
G3933G Oatmeal Alberta Slip + Li
Top left is G3933G1.
Top right adds 4% lithium carbonate.
Bottom left: 6% lithium carbonate.
Bottom right: Amaco PC-32 Albany brown.
All are fired using the C6DHSC schedule.
The Amaco glaze is on thicker and its character indicates that it may have more than 6% lithium. We will do a melt flow test to compare them further.
G3933G1 with 6% lithium carbonate vs PC-32
Fired at cone 6, drop and hold.
The PC-32 has shivered off a large section of the flow, this, along with the greater flow, suggests a high percentage of lithium carbonate, perhaps as high as 10%.
Typecodes
C6-Cone 6
Alternate Code Number:MG6CDM
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G3933 Oatmeal Alberta Slip + Li" id="246447" key="Hs2PSMQb" date="2023-11-08" typecodes="C6" codenum="G3933G1" picturebasename=""> <recipelines> <recipeline material="Alberta Slip" amount="38.102" tolerance=""/> <recipeline material="Alberta Slip 1000F Roasted" amount="13.000" tolerance=""/> <recipeline material="Calcined Kaolin" amount="10.309" tolerance=""/> <recipeline material="Ferro Frit 3249" amount="11.403" tolerance=""/> <recipeline material="Silica 325" lookup="Silica" amount="16.272" tolerance=""/> <recipeline material="Calcium Carbonate" amount="5.829" tolerance=""/> <recipeline material="Dolomite" amount="5.289" tolerance=""/> <recipeline material="Tin Oxide" amount="5.000" added="true"/> <recipeline material="Rutile" amount="1.500" added="true"/> </recipelines> </recipe> </recipes>
Born: 2014-03-21, Modified: 2023-11-08 04:39:55
Classic Albany Lithium Brown Glossy
|
Code # G2415E |
| Materials | Amt |
|---|---|
| Lithium Carbonate | 10.000 |
| Tin Oxide | 4.000 |
| Albany Slip | 86.000 |
Total:100.00
Auto Unity Formula
|
Si:Al: 6.7:1 6.4 (Molar:5.9) 14.0 |
Notes
*This recipe was popular for many years. Over time people reduced the amount of lithium (trading it for a feldspar). The high Albany Slip content made the slurry difficult to use (drying shrinkage and crawling being the main issue). People did not learn to solve that by roasting part of the Albany clay (as is done with Alberta Slip now).
Glaze manufacturers generally have a variation of this in their lineups.
Pictures
Albany Lithium brown using Alberta Slip
Alternate Code Number:GA6-G
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Classic Albany Lithium Brown Glossy" id="73394" key="3oA65Z5t" date="2023-10-31" codenum="G2415E" picturebasename=""> <recipelines> <recipeline material="Lithium Carbonate" amount="10.000" tolerance=""/> <recipeline material="Tin Oxide" amount="4.000" tolerance=""/> <recipeline material="Albany Slip" amount="86.000" tolerance=""/> </recipelines> </recipe> </recipes>
Born: 2003-09-26, Modified: 2023-10-31 20:57:12
G2415E Alberta Slip Brown (less Li)
|
Code # G2415J |
| Materials | Amt |
|---|---|
| Alberta Slip | 40.000 |
| Alberta Slip 1000F Roasted | 35.000 |
| Ferro Frit 3249 | 17.000 |
| Silica 325 mesh (Silica) | 4.000 |
| Additions | |
|---|---|
| Tin Oxide | 4.000 |
| Lithium Carbonate | 5.000 |
Total:105.00
|
Si:Al: 6.4:1 6.3 (Molar:5.9) 8.0 |
Notes
*The lithium has been cut (to reduce cost). You can increase it a little if greater contrast between light and dark is desired.
This substitutes Alberta Slip for the Albany (it was already known to work on G2415E).
To keep thermal down this introduces a low expansion MgO frit (at the expense of some of the Alberta Slip). The introduces boron to help maintain the high melt fluidity that 10% lithium imparted.
If this crazes more silica can likely be tolerated. If it shivers some of the frit could be traded for Ferro Frit 3110 (to add Na2O and raise thermal expansion).
Pictures
Melt flow test of lithium brown cone 6 glazes
Left to right:
G2415K without the iron and tin.
G2415K with the iron and tin.
G2415J - the original Alberta Slip using raw lithium carbonate.
G2860 - AMACO Albany brown commercial glaze.
Even though the chemistry of G2415K is the same as the G2415J, it is has much better melt fluidity and almost no entrained bubbles (because of the fritted source of lithium).
The Amaco glaze appears to have a different mechanism, only exhibiting the brown where thin.
G2415J, K, K+3% TIO2 on M340
The titanium mattes the surface.
The K, which uses a lithium Frit, is much more runny an active. This sample was not mixed enough and some particulate tin and iron remained.
Alternate Code Number:GA6-G1
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G2415E Alberta Slip Brown (less Li)" id="66651" key="7QFS2RqP" date="2023-10-31" codenum="G2415J" picturebasename=""> <recipelines> <recipeline material="Alberta Slip" amount="40.000" tolerance=""/> <recipeline material="Alberta Slip 1000F Roasted" amount="35.000" tolerance=""/> <recipeline material="Ferro Frit 3249" amount="17.000" tolerance=""/> <recipeline material="Silica 325 mesh" lookup="Silica" amount="4.000" tolerance=""/> <recipeline material="Tin Oxide" amount="4.000" added="true"/> <recipeline material="Lithium Carbonate" amount="5.000" added="true"/> </recipelines> </recipe> </recipes>
Born: 2013-06-03, Modified: 2023-10-31 21:07:24
AMACO PC-32 Albany Brown
|
Code # G3860 |
Notes
Pictures
PC-32 applied thick on M332 - slow cool
PC-32 on M340, thickly applied
PC-32 over G2934 Black
On Plainsman 3B MNP native clay.
PC-32 on G2934 matte black at cone 6
On Plainsman M340.
Melt flow test of lithium brown cone 6 glazes
Left to right:
G2415K without the iron and tin.
G2415K with the iron and tin.
G2415J - the original Alberta Slip using raw lithium carbonate.
G2860 - AMACO Albany brown commercial glaze.
Even though the chemistry of G2415K is the same as the G2415J, it is has much better melt fluidity and almost no entrained bubbles (because of the fritted source of lithium).
The Amaco glaze appears to have a different mechanism, only exhibiting the brown where thin.
XML (to paste into Insight)
Born: 2018-11-09, Modified: 2023-11-03 21:12:30
