This test is to show that you can vary the amount of crawl by changing what you put under the crawl glaze. This is the same crawl but with 3 different things under it. Cone 04. From the right slip / slip glaze / glaze.
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- Before and after Lithium wash 1060c made by adding 30gr. Lithium carb. to 470 gr. hot water / 2gr Bentonite / 1 Flat teaspoon cmc or wall paper paste. Mix and put through a fine sieve.
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- As above ie: 70% Nep Syn. 30% Wollastonite with .2% black copper oxide. The thicker glazed areas have a crackle. Cone 6 electric
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- This tile has firstly an iron earthenware glaze (1150) under with the Cover Cote glaze from this page over it. It will pool nicely, not too thick on the upright. A real nice effect though , there are rust tenmoku parts in the brown sections. This was on porcelain. cone 6 electric.
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- Invisible porcelain glaze ^6 Feldspar ( kali,potash,k) – 47 // china clay (kaolin) – 18 // Whiting (krijt ) – 22 // Zinc oxide – 4 // Flint -10 This i use to give porcelain a satin touch and to protect the work. It does not bleed out fine decorations. A good glaze to show off the clay qualities or for slip inlay as well.
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- This is the GA27 glaze as above but put over the iron under cote from the oil spot glaze on this page.This gives a dark brown to black that has life in it as the iron bleeds thru. from the under cote, so other possibilities are there as in a red stain added to the under glaze? cone 6 electec
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- This is SE41, from the book dry glazes but here i put it over a terra sigillata that has a soda ash content. This can also be done after the works is glazed as it only needs cone 05/06 in the bisc kiln.
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- Dry purple decorative glaze ^6 A dry purple glaze that breaks to a golden brown where thin. Only for decorative work. i am further testing this with an addition of Lithium to see if i can get it just a bit more of a satin glaze. Anyway here is the basic recipe. Barium carbonate- 40 / Potash feldspar ( Kali ) or K feldspar- 28 / Nepheline syenite – 12 / Ball clay- 2 / Copper carbonate – 6 / China clay (kaolin)-18 / Bentonite -1.5 /
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- 50/50 Porcelain/wola. glaze ^6 This is my wonder glaze for 1220c. It has a soft satin shine that is not harsh at all.There is a trick to it!!!. You have to first go out and buy a block of low temp. porcelain clay. (1250c not 1300c ) Cut it up and dry. Then make a mix of 50 % of the dry porcelain and 50 % Wollastonite, by weight. Blend it up well and use.I have put it on real thick once and it gives the best small crackle. Also looks good with a hint of a color oxide in. Normal soak time i use is 35 min.
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- This is simple cone 6 electric glaze with a nice crackle and satin finish. 80% Nep. Syn. and 20% Wollastonite
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- This effect was done cone 05/06 in a bisc kiln.Underneth i put a low temp iron glaze as in any raku glaze with 9-10 % iron with a lichen glaze over it.- Borax-27% /mag.carb 33% / Ger.borate- 33% / Silica 7% / Zircopax -7% Glaze from B.Sabin.
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- A cone 6 electric Davis shino that i changed a bit .Soda ash16.3 / ball clay 13 / epk 17 / soda veldsp. 9.3 / Nep Syn. 28 / Lithium feldsp. 10. Here i have not added any iron ext.. yet. Here the glaze contains 10% washed wood ash. Applied thin.
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- Cover cote. ^6 White cover cote for oil spot. A good all rounder that can also be used alone and gives good bleed thru effects as it does in the oil spot glazes.Here it is over red iron slip (slip #28 ) on the right and a cobalt sulphate on the left.Note how the imprint is picked up by the sulphate. This glaze i found on Alisa Clausens flicker. Oil spot cover glaze. 30 K Feldspar (Potash / kali )+30 Gerstley Borate+25 silica + 5 EPK ( china clay )+ 10 Zircopax
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- B 52 Crawl glaze ^6 B-52 Crawl glaze that is smooth to the touch. Apply thick to crawl. 60 Nep Syn. + 30 Magnesium Carbonate + 12 Ball Clay + 6 Bentonite.
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- Iron oil spot ^6 This is a two part glazing with the oil spot cover glaze from above going on top of the following.: 48 Feldspar ( potash / kali ) + 24 Silica + 17 Whiting (krijt) + 11 China Clay ( kaolin ) + 10 red iron oxide. This should not soak to long at top temp. I set my oven to 1215 for this glaze and cool off quickly so no ramp down.
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- This is simple cone 6 electric glaze with a nice crackle and satin finish. 70% Nep. Syn. and 30% Wollastonite
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- Alisa butter cone6 Alisa butter ^6. This is also a versatile glaze that covers well and does not bleed under glazes and as you see from the test the iron test ( terra ) on the side survives quite well. 59 Nep. syn. + 6.6 Talc +8 dolomite + 26 Ball clay Add: Up to 10% Tin -OR- Rutile 6% -or- Titanium 5%. Takes oxides well so test away.
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- A cone 6 electric Davis shino that i changed a bit .Soda ash16.3 / ball clay 13 / epk 17 / soda veldsp. 9.3 / Nep Syn. 28 / Lithium feldsp. 10. Here i have not added any iron ext.. yet. Here the glaze contains 10% washed wood ash. Applied thick.
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- This is the same glaze as above (20-20-10) with under glaze added but put on top of albany slip. cone 6 electric.
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- An old looking white with a satin sheen. Properties of the clay body will shine through. 20%-Calcium Borate frit./20% Dolamite / 20%- Kali (K) spar /20-Ball /20- Silica / 10- Zircon . Second tile also has 3% rutile.
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- This is under cote ( from the iron oil spot on this page) with a SG 13 + 5% Zircon over it. Cone 6 electric , a very nice soft finish to it.
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- GA27 cone 6 electric, black. Soda feld.-15.3 / cal.bor. frit.-10.8 / Alkali frit- 11 / epk- 17.5 / talc – 4.7 / whiting (krijt) -7 / silica -33.7 / Add: 2% bent +0.9% black iron ox.+ 1.5% cobalt carb.. This tile shows this glaze on top of an albany slip, applied one after the other has dryed enough.
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- Albany slip under 20/20/10 glaze from this page. cone 6 Electric.
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- Before and after Co 22./ 1060c From the book Dry Glazes, J Jernegan. Lithium carb.70/ Borax 10/ Bentonite 15/ Cornwall stone 5.
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- code / 20-20-10. A cone 6 electric white. A very nice satin white that covers well and has a nice thickness of body to it, and it is a simple recipe . /Cal. Bor. Frit-20 / Molachite -20 / Silica-20 / Kali Feld. (k) -20 / Wollastonite- 20 / Zircon silicate-10.
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- Here is a yellow amaco velvet under glaze with a terra sigillata over it.Note: this terra was made with soda ash so there was enough melting agent. Cone 4 electric.
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- Glaze 25/9/05 satin mat ^6 Name: 25/9/05. This glaze is one that i have used since my academy days.This is a glaze that will make a pot silky to the touch. It gives a durable finish and looks good on porcelain work. You have different see thru efects depending on how thick it is as you see on the test. 47 Feldspar ( Potsah / kali ) + 18 China clay + 22 Whiting ( krijt ) + 4 Zinc oxide + 5 Flint. A good glaze for covering slips or slip trailing.
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- This is the code 20-20-10 glaze cone 6 electric but with an a small amount of amaco velvet under glaze added , a glaze that would take the amaco colors for variation .glazes. A nice satin finish with no hint of cracks.
Here are the glazes i use at the moment for my work but as always you must do a small test on all glaze recipes, to see you like the results , before mixing a large batch .I will keep adding to this file as time permits.
Some of your earlier work has a red glaze decoration-beautiful happy colour. Is this and the glazes you have posted achieved with gas firing? I have an electric kiln. Thanks for sharing.
Thanks,
Nikki
Hi Nicola, The glazes i have posted for cone 6 are all electric fired and the red is a 1050c commercial red glaze that i first spray on, then dusted with oxides ( oxides as if you were making up a black pigment ) over the sprayed piece before electric glaze firing or spray with a hand pump, it gives nice specs and spots. This then melts in nicely with the red glaze and gives the glaze a life and color as if fired in gas. You can also dust oxides pigments glazes over the glazed piece with a fine mesh . Some of my red glazes are also smoke fired again as i find this also finishes off the piece by making the bare clay on the piece black. This i do in gas but can also be done with a raku firing if you use a raku clay.
Many thanks,
Blayne Knox.
Hi!
Love your work!
In the recepie 20-20-10 there is Molachite. Is it possible to use something elese as substitute?
Best regards
Mia
Hi there Mia, In this glaze the molochite will be giving the glaze its white color and a lot of the glaze strength so i would not recommend changing it. If you are going to have to buy some make sure you get the fine grain. It is normally very cheap. I also add it to my porcelain clays to stop warping and shrinking to much in the kiln. Molochite is used for its lack of impurities like iron so other grogs or fillers might change the color. I hear that Molochite can be replaced with 45% silica and 55% of either mullite or kyanite in slips as these are going to normally get a color added. For the look of the glaze and glaze formula stick with the molochite.
Ok, thank you very much. I have found a shop in Sweden were I can buy molochite now.