White Crawl glaze over Licorice on Little Loafers Clay

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Comment by Denice E. Demuth on March 3, 2014 at 9:24pm

Thank you for the White Crawl Glaze formula, I know how much trouble you went to.  I am looking forward to your next test.  Denice

Comment by George Lewter on March 3, 2014 at 8:02pm

The White Crawl Glaze on my conical bottle consists of:

Nepheline Syenite 70

Magnesium Carbonate 25

Ball Clay (OM4) 5

This glaze over licorice was a really good match with both glazes well melted and largely leveled out, while retaining distinct borders, and not moving too much.

The White Crawl needs to go on thick enough that a network of cracks forms over its surface as the water is pulled out of it. It will then be prone to flaking off the base glaze during handling and even in the firing, particularly if it is applied over a powdery, poorly bonded base glaze. I want to try this glaze over C Harris Tenmoku next.

Thanks to Eric Evans at MIY Ceramics for sharing the recipe with us.

Comment by Norm Stuart on March 2, 2014 at 1:24pm

Magnesium crawl glazes have high surface tension, but this can be sabotaged by additional flux from the underlying glaze.

This is a crawl glaze made from a glaze with 30% Magnesium Carbonate over a stiff glaze on the left, and over a more fluid high-flux glaze on the right.

Cone 6 Oil Spot glazes create high surface tension through with a different ingredient, 10% or more of refractory colorants like Zircopax and or Mason Stains.   These glazes are more resistant to mixing with flux from the underlying glaze.

So the more fluxed and fluid glaze on the right is preferable to break the refractory over-glaze into smaller fragments.

Comment by juli long on March 2, 2014 at 12:24pm

looks like a bunch of alien faces!!! Too cool!

Comment by George Lewter on March 2, 2014 at 8:51am

The white crawl glaze is a studio glaze at MIY Ceramics in Hollywood FLA. Erik Evans could give us the recipe, or I can get it when I'm there next. Erik is now a member of the Insight-Live Users Group, and will be adding recipes there as he learns to use the system.

Comment by Denice E. Demuth on March 2, 2014 at 5:47am

George do you make your own White Crawl glaze or is it purchased?  I like the edge on the bottom, it catches the excess glaze and makes it look like the pot is growing out of the ring of glaze.    Denice

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