August 3, 2009
Do you Raku? Ten Tried and True Raku Glaze Recipes Available for Download
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We are rolling out another in our series of free downloads today - this one is for all you raku firers out there. Ten Tried and True Raku Glaze and Slip Recipes: Recipe Cards for our Favorite Raku Pottery Glazes includes a fantastic assortment of raku glaze recipes including several copper matts, a white crackle and even a shino! Today, I am excerpting one of those glazes - the shino - as a sneak peek. But you can download the whole shebang from our free gifts page! - Jennifer Harnetty, editor. | ||||||||||||||||||
This is a semi-opaque glaze with an excellent crackle texture and tan to silvery color characteristics,
depending on firing temp. Works well in combination with other glazes. |
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This recipe is included in
Ten Tried and True Raku Glaze and Slip Recipes: Recipe Cards for our Favorite Raku Pottery Glazes, which is free to Ceramic Arts Daily subscribers.
Ten Tried and True Raku Glaze and Slip Recipes: Recipe Cards for our Favorite Raku Pottery Glazes, which is free to Ceramic Arts Daily subscribers.
tracey | August 3rd, 2009 at 2:46 pm
can’t get the recipes to load, using a Mac, is that the problem?
Jennifer | August 3rd, 2009 at 4:20 pm
Tracey - Your MAC should not be causing any problems in downloading the raku glaze recipes. I am guessing that you need to update your Adobe Acrobat Reader software. You can download the latest version here:
http://get.adobe.com/reader/
M. A. | August 3rd, 2009 at 6:48 pm
I am wondering about the firing temp for the recipe listed which produced the photo result shown.
Jennifer | August 4th, 2009 at 7:57 am
I can’t say for sure on the temperature. Most raku glazes are formulated to melt at around cone 06, but a lot of raku firers just do it by observation - looking into the kiln for a desirable glaze melt. I would say, use 06 as a rough starting point, but monitor the firing closely and remove when the glaze is molten. - editor.
mark | August 8th, 2009 at 7:47 am
Mark Lusardi
Directions pottery
1411Hidden Oak Trail
New Richmond, WI 54017
Lusardi@frontiernet.net
I am responding to the comment about firing Raku Glazes and what cone temperature would be the desired choice. The Choice of temperature depends upon the artist and what type of glaze that they are using. If you are using a matte glaze or patina, then you only need to get to 1600 degrees to get the glaze to respond. If your firing a white, gloss, or like the one listed above then you can fire it from 06 up to 04 to obtain a variety of effects. I use a parameter to fire my glazes as well as the visual observation, and I will let my pieces cool in the kiln to around 1600-1400 before I start pulling them to the reduction bins. I tend to go hot and let the glazes run like a salt fire and the results are truly amazing.
I have also another comment and that is about the continuation of glazes utilizing the Gerstley Borate Material, so I have added a little bit about glazes that I have reformulated to match the tried and true soldner clear and various others with great success.
I have been making and firing Raku pottery and glazes since 1986 and I have adapted my glazes to new materials as old materials like colemanite or Gerstley Borate are no longer available. I know that you can get still get Gerstley Borate, but it hasn’t been mined since 2000 and the potters in my area have found that this material doesn’t respond like it used to. In 2003 I reformulated my glazes and came up with a base that is similar to the old Paul Soldner recipe, and acepts the addition of colorants just like the old base glaze. i just wish that when we are printing new material that we look into the possibility of using the materials that were designed to replace the out going product. The glazes that I use incorporate Gillespie Borate a product of Hamill and Gillespie the company that was mining and supplying Gerstley Borate. I find that the color is more vibrant and that the flashes of copper patina have stayed the same since I made those changes and that my work is selling due to the stronger pallet. I have listed below a couple of glazes that utilize Gillespie Borate and would encourage other Raku Artists to give it a try.
Thanks
Lusardi Clear Base ^06-^04
(Matches the old Soldner Clear)
Gillespie borate 62.5%
Nepheline Syenite 8.9%
Custer Feldspar 8.9%
Epk 11.0%
Silica/flint 8.9%
For Copper Glazes follow below:
Delfavaro
base 100%
Copper Carb 2%
Copper Penny
Gillespie Borate 62.5
Nepheline Syenite 8.9
G 200 Feldspar 8.9
#6 Tile Clay 11.0
Silica 325msh 8.9
ochre 8.0
Black copper ox 2.0
cobalt ox 1.0
Harvest Wheat
Base 100%
Copper Carb 4%
Yellow Ochre 8%
Copper flash
Base 100%
Copper Carb 5%
Stannous Chloride 2%
(Mother of Pearl Luster also works at 1/2 an oz per gallon) this addition will also thicken the glaze, but produces wonderful purples/gold/copper patinas
Sandy Scott Revised
Gillespie Borate 38.00
Lithium Carb 17.00
Spodumene 19.00
G-200 Feldspar 8.50
Superpax 10.00
Copper Carb 4.00