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G3806 Cone 6 Fluid Melt Clear Glaze Project 2015 - Stage 2 (Adjust Panama Blue)
G3806 Cone 6 Fluid Melt Base Glaze Project 2019 - Stage 3 (Even Lower COE)
Highest Possible Melt Fluidity Cone 6 Clear Glaze
Comparison of 6 high melt fluidity cone 6 transparent base glazes for electric firing. These bases a valuable for adding stains, opacifiers, variegators to make reactive glazes.
Project Name Compare Cone 6 clear fluid glazes Project Codenumber UnAssigned Notes This project compares a variety of fluid-melt (runny) cone 6 base base glazes. Why do this? The initial objective was to create a good copper blue. But that was extended to create a fluid-melt base to which other oxide and stains can be added to make brilliant colors. Objectives: |
Low Zinc High Feldspar Fritless base Roberta Capogna Bateman - cone 6
Total:102.00 Auto Unity Formula
Notes *This does not have the brilliant gloss the other fluid melt recipes in the comparison have have. The amount of entrained bubbles on the brown stoneware are evidence of this. Pictures G3814 Low Zinc High Feldspar Fritless base G3814 Low Zinc High Feldspar Fritless base melt balls Top: G3814 At: six on red, buff, white bodies Although this melts well enough to look good on the buff and white burning clays, the melt is stiff enough that lots of bubbles are trapped in the red burning one Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Low Zinc High Feldspar Fritless base" keywords="Roberta Capogna Bateman - cone 6" id="74784" key="j4H7vGLv" date="2015-07-06" codenum="G3814" email="robertabateman@me.com"> <recipelines> <recipeline material="Custer Feldspar" amount="53.000" tolerance=""/> <recipeline material="Silica" amount="17.000" tolerance=""/> <recipeline material="Whiting" amount="15.000" tolerance=""/> <recipeline material="EP Kaolin" amount="6.000" tolerance=""/> <recipeline material="Zinc Oxide" amount="5.000" tolerance=""/> <recipeline material="Talc" amount="4.000" tolerance=""/> <recipeline material="Tin oxide" amount="1.000" added="true"/> <recipeline material="Copper Carbonate" amount="1.000" added="true"/> </recipelines> </recipe> </recipes> Born: 2015-06-05, Modified: 2015-07-06 09:05:48 |
Wright's Water Blue Base Cone 6
Total:107.00 Auto Unity Formula
Notes *From David Wright, CM 1998 Pictures Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: CM Top Ten cone 6 glazes - Water Blue G2938 Wright's Water Blue From Vivian Pyle XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Wright&#039;s Water Blue Base" keywords="Cone 6" id="60278" key="Wmq9PbT6" date="2024-07-01" codenum="G2938" email="kathryn.kearns@solano.edu"> <recipelines> <recipeline material="Lithium Carbonate" amount="3.000" tolerance=""/> <recipeline material="Strontium Carbonate" amount="9.000" tolerance=""/> <recipeline material="Ferro Frit 3110" amount="59.000" tolerance=""/> <recipeline material="EP Kaolin" amount="12.000" tolerance=""/> <recipeline material="Silica" amount="17.000" tolerance=""/> <recipeline material="Bentonite" amount="2.000" added="true"/> <recipeline material="Copper Carbonate" amount="5.000" added="true"/> </recipelines> </recipe> </recipes> Born: 2014-07-08, Modified: 2024-07-01 13:45:23 |
Cone 6 Bright Clear - Shaun Mollonga Gerstley Borate
Total:100.00 Auto Unity Formula
Notes *Being used by Shaun Mollonga at Medalta June 2015 on M390. I would like to get the real name of it. Pictures Bright clear cone 6 with frit Top row: thick layer of Gerstley, Frit version Fluid cone 6 clear glazes These are 10 gram glaze balls are fired down onto tiles to demonstrate melt fluidity and bubbling. Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: URLs Cone 6 Fluid Clear Glaze Comparison XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 6 Bright Clear - Shaun Mollonga" keywords="Gerstley Borate" id="74714" key="StRnJdag" date="2015-10-08" codenum="G3808"> <recipelines> <recipeline material="Minspar 200" amount="40.000"/> <recipeline material="OM4 Ball Clay" amount="15.000"/> <recipeline material="Gerstley Borate" amount="35.000"/> <recipeline material="Silica" amount="10.000"/> </recipelines> </recipe> </recipes> Born: 2015-06-02, Modified: 2015-10-08 12:09:08 |
Cone 6 Bright Clear using Frits
Total:100.00 Auto Unity Formula
Notes *The recipe started as one having 35% Gerstley Borate, it gelled so badly it was almost unusable and had a very high LOI. Using Insight-live I calculated an recipe having the same chemistry but sourcing the high boron from frits instead. It substitutes kaolin for ball clay also, this should suspend it better. Pictures Bright clear cone 6 with frit Top row: thick layer of Gerstley, Frit version Various fluidities cone 6 clear Left: 2926b G3808A bubbles in glaze G3814 Low Zinc High Feldspar Fritless base melt balls Top: G3814 Fluid cone 6 clear glazes These are 10 gram glaze balls are fired down onto tiles to demonstrate melt fluidity and bubbling. Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: Cone 6 on M370 - 15 minute soak blisters on the ventilation hole side of a mug. G3808A highly melt fluid clear on a red body Has extenal picture also This is Plainsman M390 fired to cone 6 oxidation. The firing was soaked, dropped 100F and soaked again, then 108F/hr cooled to 1400F. Highly fluid clear glazes work much better on bodies like this (not finely ground, containing high iron clays) because they are able to pass the extra bubbles generated as particles decompose (and create gases) during firing. However there is a danger that blisters will form where the glaze is thicker, and of course, that it will run off the ware onto the shelf. So care needs to be taken to apply it thinly. Compare four clear bases for copper blue Has extenal picture also The flow testers at the back and the melt-down-balls in from of them have 1% copper carbonate. The glazed samples in the front row have 2% copper carbonate. L3806B, an improvement on the Panama Blue recipe, has the best color and the best compromize of flow and bubble clearing ability. G3808A vs 2926B flow test URLs How to gel a glaze..pension properties XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 6 Bright Clear using Frits" id="74715" key="y5T7Mrza" date="2015-07-30" codenum="G3808A"> <recipelines> <recipeline material="Minspar 200" amount="27.984" tolerance=""/> <recipeline material="EP Kaolin" amount="14.873" tolerance=""/> <recipeline material="Ferro Frit 3134" amount="31.746" tolerance=""/> <recipeline material="Silica" amount="11.111" tolerance=""/> <recipeline material="Ferro Frit 3249" amount="11.111" tolerance=""/> <recipeline material="Wollastonite" amount="3.175" tolerance=""/> </recipelines> </recipe> </recipes> Born: 2015-06-02, Modified: 2015-07-30 21:55:14 |
Campana Cone 6 Transparent Glaze 3134, Spodumene, Zinc
Total:100.00 Auto Unity Formula
Notes *This is a popular fluid-melt cone 6 base recipe. We first compared it with 4 others in an effort to produce a fluid-melt, super-gloss, low-expansion transparent base. This appears to be the 20x5 recipe with Custer feldspar switched for a mix of zinc and spodumene (combining the power of lithia, zinc and boron fluxes to achieve a very low calculated thermal expansion, it does not craze on any of the bodies tested). Interestingly, because it has lots of melt fluidity it could likely accept more Al2O3 and SiO2 and yet still fire glossy (meaning the expansion could be taken still lower). Pictures Compared with G2926B These are 10 gram balls melted down onto a tile to demonstrate fluidity, clarity and bubbling. G3813 16x closeup of entrained bubbles Others also had bubbles, but there are alot here. And they are all the same size (in clouds). Although the photo does not show it clearly, hundreds of these are breaking at the surface, leaving dimples. This was fired by drop-100F-an-soak. This would do better in clearing itself with thinner application. G3814 Low Zinc High Feldspar Fritless base melt balls Top: G3814 Fluid cone 6 clear glazes These are 10 gram glaze balls are fired down onto tiles to demonstrate melt fluidity and bubbling. Campana clear on Plainsman M370,340,390 These were ice water tested at 260F and did not craze. Coverage is defect free on all three clays. Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: Compare four clear bases for copper blue Has extenal picture also The flow testers at the back and the melt-down-balls in from of them have 1% copper carbonate. The glazed samples in the front row have 2% copper carbonate. L3806B, an improvement on the Panama Blue recipe, has the best color and the best compromize of flow and bubble clearing ability. XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Campana Cone 6 Transparent Glaze" keywords="3134, Spodumene, Zinc" id="75226" key="3Y3e8wxN" date="2018-03-19" codenum="G3813" email="strawdogs@hotmail.com"> <recipelines> <recipeline material="Spodumene" amount="11.000" tolerance=""/> <recipeline material="Ferro Frit 3134" amount="21.000" tolerance=""/> <recipeline material="EP Kaolin" amount="20.000" tolerance=""/> <recipeline material="Silica" amount="20.000" tolerance=""/> <recipeline material="Wollastonite" amount="20.000" tolerance=""/> <recipeline material="Zinc Oxide" amount="8.000" tolerance=""/> </recipelines> </recipe> </recipes> Born: 2015-06-23, Modified: 2018-03-19 15:58:30 |
Panama Blue 3 - Copper Carbonate 3110, 3134, zinc, Sr
Total:103.50 Auto Unity Formula
Notes *After a year of storage we found a considerable amount of hard dark precipitate lumps stuck to the bottom and walls of glaze bucket. Very hard and had to scrape off with fettling knife. This could be because of solubility of Frit 3110. Pictures Fluid cone 6 clear glazes These are 10 gram glaze balls are fired down onto tiles to demonstrate melt fluidity and bubbling. Fluid cone 6 clear glaze comparison Top are 10 gram balls melted down onto a tile to demonstrate melt fluidity and bubble populations. Cone 6 High Fluid Melt Transparents The chemistry of these glazes falls outside typical cone 6 boron, soda, calcia, magnesia chemistry. Why? To achieve higher melt fluidity for a more brilliant surface and for more reactive response with colorant and variegator additions. Classified by most active fluxes they are: Compare four clear bases for copper blue Has extenal picture also The flow testers at the back and the melt-down-balls in from of them have 1% copper carbonate. The glazed samples in the front row have 2% copper carbonate. L3806B, an improvement on the Panama Blue recipe, has the best color and the best compromize of flow and bubble clearing ability. 2% Copper carbonate in two different cone 6 copper-blues The top base glaze has just enough melt fluidity to produce a brilliant transparent (without colorant additions). However it does not have enough fluidity to pass the bubbles and heal over from the decomposition of this added copper carbonate! Why is the lower glaze passing the bubbles? How can it melt better yet have 65% less boron? How can it not be crazing when the COE calculates to 7.7 (vs. 6.4)? First, it has 40% less Al2O3 and SiO2 (which normally stiffen the melt). Second, it has higher flux content that is more diversified (it adds two new ones: SrO, ZnO). That zinc is a key to why it is melting so well and why it starts melting later (enabling unimpeded gas escape until then). It also benefits from the mixed-oxide-effect, the diversity itself improves the melt. And the crazing? The ZnO obviously pushes the COE down disproportionately to its percentage (although there is further to go because it is crazing somewhat). Copper Blue G8306C using copper carbonate, oxide Right is G3806C, an adjustment to drop the thermal expansion of B. It does this by trading some of the high-expansion KNaO for a mix of MgO, ZnO and SrO. These is an improvement but it still could craze over time on high-kaolin or low silica porcelains. XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Panama Blue 3 - Copper Carbonate" keywords="3110, 3134, zinc, Sr" id="75240" key="6jH7KPYb" date="2017-01-07" codenum="G3806B" email="untdkm@sasktel.net"> <recipelines> <recipeline material="Custer Feldspar" amount="11.500" tolerance=""/> <recipeline material="Silica" amount="20.000" tolerance=""/> <recipeline material="Whiting" amount="1.000" tolerance=""/> <recipeline material="Kaolin" amount="15.000" tolerance=""/> <recipeline material="Dolomite" amount="8.000" tolerance=""/> <recipeline material="Strontium Carbonate" amount="4.000" tolerance=""/> <recipeline material="Ferro Frit 3110" amount="29.500" tolerance=""/> <recipeline material="Ferro Frit 3134" amount="7.500" tolerance=""/> <recipeline material="Zinc Oxide" amount="2.500" tolerance=""/> <recipeline material="Tin Oxide" amount="2.500" added="true"/> <recipeline material="Copper Carbonate" amount="2.000" added="true"/> </recipelines> </recipe> </recipes> Born: 2015-06-02, Modified: 2017-01-07 12:21:33 |