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High Ball Clay Cone 6 Glaze


docweathers

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I will try your slip recipe in Insight and see if I can turn it into a glaze, probably with some frit and removing the kaolin.

 

 I'm curious where and how you were able to search for a high ball clay glaze/slip.

 

 My hope is to come up with a base glaze recipe that I can put over bisque and then do mocha diffusion on it.

 

I'm still experimenting with the mocha diffusion process to get the kind of patterns I want. Most often I'm getting very pretty fine delicate flower like patterns which would be blurred by glaze over them. I'm still working out getting the dendrite affect  on a consistent basis. 

 

thanks for the help

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I searched 'mocha diffusion pottery' in google and this page came up http://ceramicartsdaily.org/pottery-making-techniques/ceramic-decorating-techniques/mocha-diffusion/ The recipe is there.

 

I would make some little plates and try many combinations of ball clay and stuff with the diffusion. Blends of two things, three things and four things. It will give you a better idea than insight. Flat is good incase something melts badly.

 

I would start with a feldspar and ball clay, some frit and ball clay and a high CaO flux with ball clay. Whatever you have in the glaze cupboard.

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Am I right in thinking that the glaze is diffusing/blurring the mocha pattern on the bisqued slip?

 

If so, you might consider trying mocha diffusion into slip using stains as colourants. These should

resist any solvent effects of the the glaze better than oxides/carbonates.

 

If not, are you sure that you want to mocha onto the top of a glaze, which will melt and encourage

movement, rather than onto some sort of self-glazing slip?

 

Regards, Peter

 

I've only tried a few mocha test-pieces, some years ago. I failed to get mocha patters large enough 

for my decorating ideas and lost interest, but had no problems with glaze-induced blurring -- so it's

not inevitable.

 

If you are using iron oxide as colourant you might look at Cardew's iron red (minus the iron) as it is

intended not to disolve iron. (Book not at hand, full details if you want them.)

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yes I am wanting to try this on top of tbisque versus greenware. 

 

I have some encapsulated stains that should be very resistant to the solvent affect you describe.

 

This whole project may not be a good idea but was is something I'm kind of fiddling with has an interesting possibility.

 

I really haven't made much use of iron oxide as a colorant. I tend to like little brighter colors.

 

 

thanks for your suggestions

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