Electric Cone 6 & Other Ways w/ Clay
Potters & Sculptors - Making Rock from Mud
Cone 6 Glaze Recipes
Glaze Recipe Etiquette
Many recipes are already posted on this network, and you can search for them yourself by typing in the name in the SEARCH box at the upper right hand corner of all of our pages. A thousand or more are listed on the Sankey glaze database which is also posted on this network. With the Sankey database, which is an enormous web page, you need to go to the edit menu of your browser and select "Find", then type in the glaze name you are searching for. Look down the page with the "Find Next" button until you've checked all the possibles. The next step would be to do a Google search of the Internet for the recipe you're looking for. If you find the recipe, it would be generous and helpful to post it on our network yourself, giving credit to the source where you found it.
If these three techniques don't turn up the recipe you seek, THEN it is a reasonable thing to request one of our members to either post the recipe on the network or to email it to you. Asking for recipes without due diligence on your part is like asking someone else to do your job for you. It will not enhance your reputation.
Cone 6 Glaze Recipes
As a starting point, here is a list of online sources of cone 6 glaze recipes.
Group 1 - Having both photographs and commentary on the glazes.
- John Post generously shares his glaze research, and coats his simple forms with spectacular glazes. He has extensive information on a technique of glaze testing.
- Alisa Clausen has the most extensive photo-documented cone 6 glaze test collection (on flicker) that I have found. Most of the recipes are for cone 6 glazes. The right column of her page links to groups of glaze tests. Her source of recipes is largely the Sankey Glaze Database which is available right here on our network.
- John Anthony's Red Hill Pottery has some great shots and notes on his tests of many published recipes.
- June Perry does extensive glaze testing and shares her results generously on her Website.
- James Jacobs has a set of ^6 recipes with pictures on his Website. Caution -- all of the photos of finished examples were fired in reduction. He says only the cobalt blues and heavy iron formulas would be useful in oxidation.
Group 2 Recipes not as well documented as Group 1
- The clayart discussions at potters.org are a prodigous source of ^6 glaze recipes, but you won't find pictures here. Some of the discussions give links to Websites with pictures, but generally you will only find recipes and written descriptions of glaze characteristics. The SDSU ceramicsweb glazebase seems to be offline. The creator of GlazeChem glaze calculation software downloaded the entire glazebase in 2001, and has it available for downloading in GlazeChem format. I've extracted the cone 6 recipes and commentary and converted it to a Word document. Here is a link for you to download the 275 page document - CeramicsWebClayartCone6Glazes.doc
- Lakeside Pottery has an extensive list of their glaze recipes, but they refer you to their gallery to see the glazes in use without a one-to-one match up of recipe to picture. These appear to be worth exploring as they produce some very nice pieces.
- Val Cushing had an article in the June 1977 issue of Studio Potter that listed a number of his recipes for glazes and engobes (or slips). Note that a number of the glazes utilize Barium Carbonate which in the intervening years has fallen from grace for its toxicity. It would be prudent not to use these glazes on the interior or mouth contact surfaces of table ware or cookware.
Group 3 Recipes lacking significant documentation.
- I have a collection of them in a Word document totalling 61 pages. I am posting the document here for you to download and test as you like. If you do test any of them, please report your results in detail here. Good Luck. collectedglazes.doc
Let's see if our members have any interest in sharing glaze recipes. If you want to post a recipe, please follow the following guidelines.
- Use the conventional 100 unit batch formula and the full descriptive names of all ingredients.
- Include the source of the recipe
- Include application methods, best thickness of application, and cautions about defects you've encountered
- Include any special firing techniques
- Post a picture of the fired glaze
- If known, include the coefficient of expansion, and the clay body you've used with the glaze.
Please do not post recipes from copyrighted sources.
Comment
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Comment by Donna Kat on April 8, 2013 at 1:41pm
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Comment by Donna Kat on April 8, 2013 at 1:39pm
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Comment by Donna Kat on April 8, 2013 at 1:39pm
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I noticed a comment on matte glazes that seemed incomplete and a reference to Lakeside Pottery as a reference. If you are following the recommendations made by Ron Roy and John Hesselberth in Mastering Cone 6 Glazes then the lower limit for silica in a glaze is 2.5 in the Unity calculation. I am seeing many glazes that are well below this measure and many of the glazes at Lakeside Pottery are below the limit. I am not saying that these glazes are not stable or usable as functional glazes but I would think they should be looked at with caution. The matte glazes in MC6 are high Calcium glazes and must be cooled slowly for crystal development. Many of the matte glazes I am seeing are under fired glazes.
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Comment by Aparna on March 11, 2013 at 12:37am -
Thank you, you ll have loads of questions coming from me in future, already liking this network for prompt reply...
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Comment by Brian Guffey on March 11, 2013 at 12:32am -
Also, Neph Sy is just a low melting flux, so theoretically any of the FF's in the range of 1100-1800 melting point will work as well as gerstley borate ... just might need to recalculate the clay and silica ratio based on the new flux(s)
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Comment by Brian Guffey on March 11, 2013 at 12:29am
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minspar 200 as well
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Comment by Brian Guffey on March 11, 2013 at 12:29am
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Aparna, f-4 (kona) feldspar.
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Comment by Aparna on March 11, 2013 at 12:23am
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Hello, can anyone help me find a substitute for nepheline syenite? In my country it's not available, and most beautiful glaze receipes have nepheline syenite.
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Comment by Marithou dupoux on January 26, 2013 at 9:46am
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Ihave fired it at^6 and it is quiet ok but I add 12% ilmenite for the out side and look quiet good
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Comment by Brian Guffey on January 26, 2013 at 9:03am
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Good point June. I would have to test to find out why they put it in there in equal parts, or in there at all to really know. ... and I'm a little too swamped with my own glaze formulations for that. ;-) I just perk up when I see it in a glaze ... as I've only used it in clay bodies.
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Comment by Barbara Hanselman on January 25, 2013 at 1:35pm -
Speaking of John Britt, he is writing a book on cone 6 glazes and is looking for glaze submissions accompanied by pictures.... JohnBrittPottery@gmail.com
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Comment by Peter H. Pache on January 25, 2013 at 11:05am -
There's an article by John Britt in the February CM about using stains, and he uses this 5x20 base glaze.
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Comment by June Perry on January 25, 2013 at 10:52am -
Brian, although wollastonite brings close to equal parts of calcium and silica to the table, the silica amount in the wollastonite and in the spar may not be enough to satisfy the amount needed in the recipe.
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Comment by Brian Guffey on January 25, 2013 at 10:24am
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hmm ... why does that glaze have silica if it's got wollastonite ... people use wollastonite to add both whiting and silica into the glaze. hmm. Yeah, should fire fine at ^5, so at ^6 it would just be a little more glossy and move a tiny bit more.
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Comment by Peter H. Pache on January 23, 2013 at 4:46pm
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It's the base glaze that I use at ^ 5, so should likely be fine at ^ 6.
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Comment by Marithou dupoux on January 23, 2013 at 1:47pm
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I have this glaze food safe clear base and want to know if it s a ^ 6. As I did not notice any indication
Wollastonite20. Ferro frit 3134 20. EPK. 20. Silica 20 Custer Feldspar 20
Thanks
Marithou
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Comment by Joanna Turnbull on September 11, 2012 at 7:37pm -
Geroge - There is a glaze listed on your list above called Crystaliine Black. Is this a standard cone 6 glaze? I guess the Crystalline part of the name has me curious. Any info would be appreciated if you have it. Thanks, Joanna
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Comment by George Lewter on June 28, 2012 at 8:34pm -
The Vals Turquoise recipe from Alisa Clausen that I posted is not missing anything. It was just not normalized to 100 units for the base recipe plus additives.
I normalized it to
Custer Spar 35.6
Gerstley Borate 21.8
Silica 27.5
Dolomite 3.7
Whiting 11.4
__________________
Total 100
Additives
Copper carbonate 2.9
Bentonite 1.0
My test of the recipe yielded results very similar to those in Alisa's photo.
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Comment by Donna Ferrara on April 23, 2012 at 7:21am -
Red River
Flint 28
EPK 18
Neph Sy 18
Bone Ash 9
Dolomite 9
Gerstley Borate 9
Talc 9
Spanish Red Iron Oxide 20%
the dr brown on the bottle is this glaze fired w/o a hold or slow cooling. I think when fired properly it should be rust, breaking dr brown.
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Comment by EE on April 6, 2012 at 1:45pm -
Hillman, you posted a pic of one of my antler mugs below, saying you are interested in getting a hares fur glaze finish. I use commercial glazes on anything meant to be food safe as I have never tested my own glazes for food safety. If you would like to duplicate the finish on my mugs use Coyote black (2 to 3 coats) as the base, followed by 2 coats Coyote Shino and sometimes I add some leopard shino too. This combination over a brown speckled clay gives a nice range of color falling into what I call camoflauge color palette.
Photos
Use These Links to Support Us
Purchase Mastering Cone 6 Glazes by John Hesselberth & Ron Roy, Glazes Cone 6 by Michael Bailey, The Potters Book of Glaze Recipes by Emmanuel Cooper, or Making Marks by Robin Hopper, all available at amazon.com
Harbor Freight is a great place to find unbeatable prices for better HVLP spray guns and serviceable economy models, as well as detail guns, all tested by our members for spraying glazes, as well as compressors to power the guns. As yet no one has tested and commented on the remarkably inexpensive air brushes at harbor freight.
The critter siphon gun is a spray alternative that is well liked by some of our members, and is available at amazon.
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Following are a few scales useful for potters:
Weighmax Top-class Stainless Steel 6KG 13LB Digital kitchen scale, ... $19.99
American Weigh Black Blade Digital Scale, 1000g X 0.1g $11.08
For the non-digitally inclined the old standard Ohaus Triple Pro Mechanical Triple Beam Balance, 2610g x 0.1g, with Tare $169.00
And finally a low cost clone of the OHaus. The Adam Equipment TBB2610T Triple Beam Mechanical Balance With Tare Beam $99.62
Videos
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